removed unused import from /sys/ping.c
removed unused import from /sys/ping.c

dailab/RIOT,locicontrols/RIOT,alex1818/RIOT,biboc/RIOT,bartfaizoltan/RIOT,asanka-code/RIOT,Lexandro92/RIOT-CoAP,ks156/RIOT,kushalsingh007/RIOT,stevenj/RIOT,RBartz/RIOT,centurysys/RIOT,RBartz/RIOT,zhuoshuguo/RIOT,BytesGalore/PetersRIOT,TobiasFredersdorf/RIOT,LudwigOrtmann/RIOT,haoyangyu/RIOT,khhhh/RIOT,rfswarm2/RIOT,msolters/RIOT,OTAkeys/RIOT,haoyangyu/RIOT,adrianghc/RIOT,ant9000/RIOT,MarkXYang/RIOT,nsol-nmsu/RIOT,kb2ma/RIOT,cladmi/RIOT,Osblouf/RIOT,mfrey/RIOT,robixnai/RIOT,rousselk/RIOT,Darredevil/RIOT,adrianghc/RIOT,gbarnett/RIOT,PSHIVANI/Riot-Code,ros2/ros2_embedded_riot,d00616/RIOT,sumanpanchal/RIOT,kerneltask/RIOT,x3ro/RIOT,RIOT-OS/RIOT,mtausig/RIOT,chris-wood/RIOT,patkan/RIOT,watr-li/RIOT,Yonezawa-T2/RIOT,phiros/RIOT,openkosmosorg/RIOT,kushalsingh007/RIOT,RBartz/RIOT,hamilton-mote/RIOT-OS,haoyangyu/RIOT,wentaoshang/RIOT,mfrey/RIOT,Lotterleben/RIOT,bartfaizoltan/RIOT,gebart/RIOT,EmuxEvans/RIOT,Hyungsin/RIOT-OS,Ell-i/RIOT,automote/RIOT,neumodisch/RIOT,roberthartung/RIOT,locicontrols/RIOT,OlegHahm/RIOT,dhruvvyas90/RIOT,benoit-canet/RIOT,lebrush/RIOT,AnonMall/RIOT,RubikonAlpha/RIOT,rfswarm2/RIOT,phiros/RIOT,kerneltask/RIOT,chris-wood/RIOT,emmanuelsearch/RIOT,koenning/RIOT,EmuxEvans/RIOT,adjih/RIOT,neumodisch/RIOT,changbiao/RIOT,RBartz/RIOT,latsku/RIOT,plushvoxel/RIOT,luciotorre/RIOT,fnack/RIOT,thomaseichinger/RIOT,rajma996/RIOT,locicontrols/RIOT,jhollister/RIOT,mtausig/RIOT,rajma996/RIOT,rakendrathapa/RIOT,rfswarm/RIOT,mziegert/RIOT,asanka-code/RIOT,gbarnett/RIOT,attdona/RIOT,jhollister/RIOT,rousselk/RIOT,josephnoir/RIOT,rfswarm2/RIOT,basilfx/RIOT,daniel-k/RIOT,jfischer-phytec-iot/RIOT,nsol-nmsu/RIOT,rfswarm2/RIOT,dailab/RIOT,kushalsingh007/RIOT,PSHIVANI/Riot-Code,TobiasFredersdorf/RIOT,benoit-canet/RIOT,automote/RIOT,MohmadAyman/RIOT,basilfx/RIOT,cladmi/RIOT,kaspar030/RIOT,yogo1212/RIOT,gautric/RIOT,patkan/RIOT,Osblouf/RIOT,herrfz/RIOT-old,Ell-i/RIOT,changbiao/RIOT,rousselk/RIOT,JensErdmann/RIOT,arvindpdmn/RIOT,sumanpanchal/RIOT,OTAkeys/RIOT,tdautc19841202/RIOT,JensErdmann/RIOT,abp719/RIOT,nsol-nmsu/RIOT,marcosalm/RIOT,msolters/RIOT,binarylemon/RIOT,Lotterleben/RIOT,stevenj/RIOT,plushvoxel/RIOT,jfischer-phytec-iot/RIOT,ks156/RIOT,plushvoxel/RIOT,BytesGalore/RIOT,southernbear/RIOT,sgso/RIOT,MarkXYang/RIOT,A-Paul/RIOT,sgso/RIOT,herrfz/RIOT-old,josephnoir/RIOT,biboc/RIOT,toonst/RIOT,kerneltask/RIOT,rfswarm2/RIOT,latsku/RIOT,kb2ma/RIOT,emmanuelsearch/RIOT,kerneltask/RIOT,dkm/RIOT,ThanhVic/RIOT,fnack/RIOT,AnonMall/RIOT,ntrtrung/RIOT,MohmadAyman/RIOT,emmanuelsearch/RIOT,dkm/RIOT,smlng/RIOT,aeneby/RIOT,sgso/RIOT,stevenj/RIOT,Ell-i/RIOT,kYc0o/RIOT,ximus/RIOT,authmillenon/RIOT,arvindpdmn/RIOT,kbumsik/RIOT,fnack/RIOT,attdona/RIOT,sumanpanchal/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,locicontrols/RIOT,rousselk/RIOT,phiros/RIOT,BytesGalore/PetersRIOT,asanka-code/RIOT,neiljay/RIOT,Lotterleben/RIOT,herrfz/RIOT-old,Yonezawa-T2/RIOT,neiljay/RIOT,biboc/RIOT,khhhh/RIOT,toonst/RIOT,gebart/RIOT,jremmert-phytec-iot/RIOT,abkam07/RIOT,spium/IoT-RIOT,watr-li/RIOT,rakendrathapa/RIOT,adjih/RIOT,latsku/RIOT,khhhh/RIOT,ks156/RIOT,wentaoshang/RIOT,ntrtrung/RIOT,jasonatran/RIOT,ThanhVic/RIOT,ntrtrung/RIOT,DipSwitch/RIOT,alex1818/RIOT,koenning/RIOT,cladmi/RIOT,neiljay/RIOT,MohmadAyman/RIOT,kYc0o/RIOT,brettswann/RIOT,MonsterCode8000/RIOT,arvindpdmn/RIOT,kbumsik/RIOT,l3nko/RIOT,jferreir/RIOT,basilfx/RIOT,beurdouche/RIOT,fnack/RIOT,alignan/RIOT,thiagohd/RIOT,tfar/RIOT,mtausig/RIOT,ks156/RIOT,avmelnikoff/RIOT,ThanhVic/RIOT,beurdouche/RIOT,phiros/RIOT,wentaoshang/RIOT,miri64/RIOT,rfswarm/RIOT,kb2ma/RIOT,southernbear/RIOT,katezilla/RIOT,EmuxEvans/RIOT,Yonezawa-T2/RIOT,jasonatran/RIOT,adjih/RIOT,jfischer-phytec-iot/RIOT,immesys/RiSyn,kaleb-himes/RIOT,binarylemon/RIOT,mtausig/RIOT,patkan/RIOT,msolters/RIOT,tdautc19841202/RIOT,mfrey/RIOT,kYc0o/RIOT,1blankz7/RIOT,basilfx/RIOT,d00616/RIOT,gebart/RIOT,mziegert/RIOT,biboc/RIOT,JensErdmann/RIOT,robixnai/RIOT,Hyungsin/RIOT-OS,jferreir/RIOT,msolters/RIOT,jremmert-phytec-iot/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,openkosmosorg/RIOT,attdona/RIOT,luciotorre/RIOT,changbiao/RIOT,herrfz/RIOT,hamilton-mote/RIOT-OS,spium/IoT-RIOT,ximus/RIOT,sgso/RIOT,JensErdmann/RIOT,lazytech-org/RIOT,abp719/RIOT,kbumsik/RIOT,katezilla/RIOT,kaspar030/RIOT,khhhh/RIOT,dhruvvyas90/RIOT,Lexandro92/RIOT-CoAP,smlng/RIOT,rakendrathapa/RIOT,phiros/RIOT,LudwigKnuepfer/RIOT,BytesGalore/PetersRIOT,MonsterCode8000/RIOT,sgso/RIOT,avmelnikoff/RIOT,PSHIVANI/Riot-Code,patkan/RIOT,tfar/RIOT,thomaseichinger/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,rfswarm/RIOT,phiros/RIOT,altairpearl/RIOT,zhuoshuguo/RIOT,rousselk/RIOT,EmuxEvans/RIOT,gbarnett/RIOT,BytesGalore/RIOT,roberthartung/RIOT,chris-wood/RIOT,MohmadAyman/RIOT,lebrush/RIOT,Yonezawa-T2/RIOT,patkan/RIOT,cladmi/RIOT,FrancescoErmini/RIOT,AnonMall/RIOT,wentaoshang/RIOT,malosek/RIOT,RIOT-OS/RIOT,RubikonAlpha/RIOT,rfuentess/RIOT,mtausig/RIOT,locicontrols/RIOT,ant9000/RIOT,herrfz/RIOT,binarylemon/RIOT,OlegHahm/RIOT,haoyangyu/RIOT,tdautc19841202/RIOT,basilfx/RIOT,LudwigOrtmann/RIOT,stevenj/RIOT,southernbear/RIOT,rakendrathapa/RIOT,benoit-canet/RIOT,changbiao/RIOT,syin2/RIOT,daniel-k/RIOT,alex1818/RIOT,immesys/RiSyn,ntrtrung/RIOT,Lotterleben/RIOT,ximus/RIOT,kushalsingh007/RIOT,lazytech-org/RIOT,mziegert/RIOT,Osblouf/RIOT,daniel-k/RIOT,chris-wood/RIOT,wentaoshang/RIOT,emmanuelsearch/RIOT,alignan/RIOT,brettswann/RIOT,MonsterCode8000/RIOT,malosek/RIOT,dkm/RIOT,BytesGalore/PetersRIOT,RIOT-OS/RIOT,centurysys/RIOT,changbiao/RIOT,miri64/RIOT,thiagohd/RIOT,automote/RIOT,jbeyerstedt/RIOT-OTA-update,MonsterCode8000/RIOT,herrfz/RIOT,shady33/RIOT,miri64/RIOT,l3nko/RIOT,d00616/RIOT,smlng/RIOT,daniel-k/RIOT,EmuxEvans/RIOT,adrianghc/RIOT,kaleb-himes/RIOT,abkam07/RIOT,malosek/RIOT,lazytech-org/RIOT,OlegHahm/RIOT,Lotterleben/RIOT,l3nko/RIOT,bartfaizoltan/RIOT,1blankz7/RIOT,Osblouf/RIOT,fnack/RIOT,openkosmosorg/RIOT,JensErdmann/RIOT,backenklee/RIOT,PSHIVANI/Riot-Code,thomaseichinger/RIOT,gautric/RIOT,FrancescoErmini/RIOT,marcosalm/RIOT,kaleb-himes/RIOT,watr-li/RIOT,backenklee/RIOT,stevenj/RIOT,kaspar030/RIOT,authmillenon/RIOT,jbeyerstedt/RIOT-OTA-update,herrfz/RIOT,syin2/RIOT,Darredevil/RIOT,Lexandro92/RIOT-CoAP,EmuxEvans/RIOT,toonst/RIOT,DipSwitch/RIOT,Ell-i/RIOT,RIOT-OS/RIOT,LudwigKnuepfer/RIOT,jbeyerstedt/RIOT-OTA-update,binarylemon/RIOT,1blankz7/RIOT,katezilla/RIOT,Lexandro92/RIOT-CoAP,thiagohd/RIOT,rfuentess/RIOT,nsol-nmsu/RIOT,RubikonAlpha/RIOT,spium/IoT-RIOT,ThanhVic/RIOT,ant9000/RIOT,fnack/RIOT,RubikonAlpha/RIOT,jhollister/RIOT,x3ro/RIOT,koenning/RIOT,immesys/RiSyn,Josar/RIOT,hamilton-mote/RIOT-OS,FrancescoErmini/RIOT,dhruvvyas90/RIOT,shady33/RIOT,smlng/RIOT,haoyangyu/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,thiagohd/RIOT,x3ro/RIOT,yogo1212/RIOT,beurdouche/RIOT,miri64/RIOT,patkan/RIOT,Hyungsin/RIOT-OS,marcosalm/RIOT,abp719/RIOT,emmanuelsearch/RIOT,rfswarm2/RIOT,kb2ma/RIOT,toonst/RIOT,abkam07/RIOT,khhhh/RIOT,arvindpdmn/RIOT,dhruvvyas90/RIOT,1blankz7/RIOT,TobiasFredersdorf/RIOT,jasonatran/RIOT,RubikonAlpha/RIOT,jferreir/RIOT,jasonatran/RIOT,robixnai/RIOT,DipSwitch/RIOT,spium/IoT-RIOT,plushvoxel/RIOT,openkosmosorg/RIOT,kaspar030/RIOT,Josar/RIOT,LudwigOrtmann/RIOT,automote/RIOT,gautric/RIOT,ThanhVic/RIOT,Ell-i/RIOT,yogo1212/RIOT,malosek/RIOT,jhollister/RIOT,BytesGalore/PetersRIOT,thomaseichinger/RIOT,malosek/RIOT,A-Paul/RIOT,josephnoir/RIOT,mfrey/RIOT,Osblouf/RIOT,ks156/RIOT,latsku/RIOT,AnonMall/RIOT,watr-li/RIOT,ant9000/RIOT,latsku/RIOT,MohmadAyman/RIOT,attdona/RIOT,shady33/RIOT,jhollister/RIOT,neiljay/RIOT,herrfz/RIOT-old,LudwigOrtmann/RIOT,smlng/RIOT,chris-wood/RIOT,RubikonAlpha/RIOT,PSHIVANI/Riot-Code,rfuentess/RIOT,shady33/RIOT,abkam07/RIOT,attdona/RIOT,zhuoshuguo/RIOT,koenning/RIOT,sumanpanchal/RIOT,authmillenon/RIOT,dailab/RIOT,jferreir/RIOT,asanka-code/RIOT,spium/IoT-RIOT,locicontrols/RIOT,centurysys/RIOT,gautric/RIOT,BytesGalore/RIOT,Darredevil/RIOT,kYc0o/RIOT,roberthartung/RIOT,rajma996/RIOT,ntrtrung/RIOT,thomaseichinger/RIOT,tfar/RIOT,wentaoshang/RIOT,biboc/RIOT,adrianghc/RIOT,tdautc19841202/RIOT,jfischer-phytec-iot/RIOT,neumodisch/RIOT,OTAkeys/RIOT,koenning/RIOT,roberthartung/RIOT,neumodisch/RIOT,syin2/RIOT,FrancescoErmini/RIOT,immesys/RiSyn,locicontrols/RIOT,ros2/ros2_embedded_riot,Osblouf/RIOT,binarylemon/RIOT,Josar/RIOT,tfar/RIOT,rfswarm/RIOT,abkam07/RIOT,luciotorre/RIOT,MarkXYang/RIOT,dkm/RIOT,OTAkeys/RIOT,brettswann/RIOT,alex1818/RIOT,msolters/RIOT,l3nko/RIOT,zhuoshuguo/RIOT,d00616/RIOT,yogo1212/RIOT,ntrtrung/RIOT,LudwigKnuepfer/RIOT,1blankz7/RIOT,thiagohd/RIOT,MarkXYang/RIOT,gbarnett/RIOT,centurysys/RIOT,DipSwitch/RIOT,asanka-code/RIOT,hamilton-mote/RIOT-OS,emmanuelsearch/RIOT,abp719/RIOT,marcosalm/RIOT,altairpearl/RIOT,stevenj/RIOT,marcosalm/RIOT,jferreir/RIOT,rajma996/RIOT,Lotterleben/RIOT,abp719/RIOT,ximus/RIOT,chris-wood/RIOT,sumanpanchal/RIOT,beurdouche/RIOT,LudwigKnuepfer/RIOT,alignan/RIOT,mziegert/RIOT,AnonMall/RIOT,attdona/RIOT,bartfaizoltan/RIOT,ThanhVic/RIOT,jferreir/RIOT,altairpearl/RIOT,marcosalm/RIOT,haoyangyu/RIOT,dhruvvyas90/RIOT,Hyungsin/RIOT-OS,katezilla/RIOT,BytesGalore/RIOT,aeneby/RIOT,d00616/RIOT,kaspar030/RIOT,jbeyerstedt/RIOT-OTA-update,altairpearl/RIOT,tfar/RIOT,ros2/ros2_embedded_riot,herrfz/RIOT,neumodisch/RIOT,LudwigOrtmann/RIOT,avmelnikoff/RIOT,RIOT-OS/RIOT,rakendrathapa/RIOT,LudwigKnuepfer/RIOT,adrianghc/RIOT,nsol-nmsu/RIOT,brettswann/RIOT,jremmert-phytec-iot/RIOT,aeneby/RIOT,lebrush/RIOT,malosek/RIOT,benoit-canet/RIOT,DipSwitch/RIOT,d00616/RIOT,Lexandro92/RIOT-CoAP,robixnai/RIOT,katezilla/RIOT,yogo1212/RIOT,rakendrathapa/RIOT,bartfaizoltan/RIOT,shady33/RIOT,RBartz/RIOT,binarylemon/RIOT,lebrush/RIOT,Darredevil/RIOT,A-Paul/RIOT,jbeyerstedt/RIOT-OTA-update,openkosmosorg/RIOT,BytesGalore/RIOT,AnonMall/RIOT,sgso/RIOT,syin2/RIOT,OlegHahm/RIOT,altairpearl/RIOT,watr-li/RIOT,dhruvvyas90/RIOT,syin2/RIOT,ant9000/RIOT,zhuoshuguo/RIOT,alignan/RIOT,hamilton-mote/RIOT-OS,openkosmosorg/RIOT,kaleb-himes/RIOT,x3ro/RIOT,daniel-k/RIOT,alex1818/RIOT,Yonezawa-T2/RIOT,centurysys/RIOT,lebrush/RIOT,BytesGalore/PetersRIOT,thiagohd/RIOT,FrancescoErmini/RIOT,immesys/RiSyn,beurdouche/RIOT,benoit-canet/RIOT,LudwigOrtmann/RIOT,MonsterCode8000/RIOT,toonst/RIOT,spium/IoT-RIOT,Lotterleben/RIOT,changbiao/RIOT,jasonatran/RIOT,arvindpdmn/RIOT,dailab/RIOT,A-Paul/RIOT,jhollister/RIOT,kushalsingh007/RIOT,dkm/RIOT,jremmert-phytec-iot/RIOT,gautric/RIOT,luciotorre/RIOT,abp719/RIOT,asanka-code/RIOT,gbarnett/RIOT,Darredevil/RIOT,BytesGalore/PetersRIOT,bartfaizoltan/RIOT,josephnoir/RIOT,aeneby/RIOT,josephnoir/RIOT,adjih/RIOT,kerneltask/RIOT,neumodisch/RIOT,alex1818/RIOT,rajma996/RIOT,FrancescoErmini/RIOT,MarkXYang/RIOT,backenklee/RIOT,zhuoshuguo/RIOT,mziegert/RIOT,alignan/RIOT,brettswann/RIOT,herrfz/RIOT,Josar/RIOT,watr-li/RIOT,avmelnikoff/RIOT,rfuentess/RIOT,A-Paul/RIOT,ximus/RIOT,automote/RIOT,southernbear/RIOT,cladmi/RIOT,robixnai/RIOT,lazytech-org/RIOT,OTAkeys/RIOT,abkam07/RIOT,1blankz7/RIOT,msolters/RIOT,dailab/RIOT,koenning/RIOT,khhhh/RIOT,authmillenon/RIOT,brettswann/RIOT,aeneby/RIOT,immesys/RiSyn,jfischer-phytec-iot/RIOT,lazytech-org/RIOT,JensErdmann/RIOT,ximus/RIOT,rfswarm/RIOT,kaleb-himes/RIOT,Josar/RIOT,gebart/RIOT,sumanpanchal/RIOT,gebart/RIOT,jremmert-phytec-iot/RIOT,backenklee/RIOT,benoit-canet/RIOT,mfrey/RIOT,ros2/ros2_embedded_riot,foss-for-synopsys-dwc-arc-processors/RIOT,latsku/RIOT,kb2ma/RIOT,l3nko/RIOT,altairpearl/RIOT,lebrush/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kYc0o/RIOT,rfswarm/RIOT,yogo1212/RIOT,luciotorre/RIOT,arvindpdmn/RIOT,TobiasFredersdorf/RIOT,rajma996/RIOT,kushalsingh007/RIOT,robixnai/RIOT,kbumsik/RIOT,Hyungsin/RIOT-OS,shady33/RIOT,MohmadAyman/RIOT,l3nko/RIOT,MarkXYang/RIOT,herrfz/RIOT-old,ros2/ros2_embedded_riot,PSHIVANI/Riot-Code,automote/RIOT,kbumsik/RIOT,gbarnett/RIOT,backenklee/RIOT,Darredevil/RIOT,x3ro/RIOT,rfuentess/RIOT,jremmert-phytec-iot/RIOT,miri64/RIOT,tdautc19841202/RIOT,ros2/ros2_embedded_riot,DipSwitch/RIOT,authmillenon/RIOT,RBartz/RIOT,TobiasFredersdorf/RIOT,mziegert/RIOT,ros2/ros2_embedded_riot,neiljay/RIOT,centurysys/RIOT,Lexandro92/RIOT-CoAP,plushvoxel/RIOT,authmillenon/RIOT,Yonezawa-T2/RIOT,adjih/RIOT,daniel-k/RIOT,luciotorre/RIOT,rousselk/RIOT,roberthartung/RIOT,MonsterCode8000/RIOT,tdautc19841202/RIOT