Removed DISCO_F407VG from the official build
Removed DISCO_F407VG from the official build

It was basically useless, since there's no corresponding target on
mbed.org

autopulated/mbed,betzw/mbed-os,infinnovation/mbed-os,jpbrucker/mbed,bulislaw/mbed-os,GustavWi/mbed,adustm/mbed,jrjang/mbed,brstew/MBED-BUILD,adamgreen/mbed,andcor02/mbed-os,svogl/mbed-os,logost/mbed,Shengliang/mbed,bcostm/mbed-os,alertby/mbed,pradeep-gr/mbed-os5-onsemi,nabilbendafi/mbed,fanghuaqi/mbed,arostm/mbed-os,fvincenzo/mbed-os,bcostm/mbed-os,bentwire/mbed,andreaslarssonublox/mbed,theotherjimmy/mbed,nvlsianpu/mbed,mbedmicro/mbed,arostm/mbed-os,mnlipp/mbed,andcor02/mbed-os,K4zuki/mbed,fahhem/mbed-os,jamesadevine/mbed,monkiineko/mbed-os,Sweet-Peas/mbed,svastm/mbed,andcor02/mbed-os,masaohamanaka/mbed,EmuxEvans/mbed,struempelix/mbed,xcrespo/mbed,K4zuki/mbed,nabilbendafi/mbed,Sweet-Peas/mbed,nRFMesh/mbed-os,mmorenobarm/mbed-os,RonEld/mbed,fahhem/mbed-os,Archcady/mbed-os,Archcady/mbed-os,wodji/mbed,bulislaw/mbed-os,mmorenobarm/mbed-os,infinnovation/mbed-os,Timmmm/mbed,HeadsUpDisplayInc/mbed,rosterloh/mbed,EmuxEvans/mbed,jeremybrodt/mbed,mazimkhan/mbed-os,getopenmono/mbed,masaohamanaka/mbed,autopulated/mbed,infinnovation/mbed-os,screamerbg/mbed,autopulated/mbed,jpbrucker/mbed,Archcady/mbed-os,larks/mbed,bikeNomad/mbed,monkiineko/mbed-os,c1728p9/mbed-os,NitinBhaskar/mbed,struempelix/mbed,jamesadevine/mbed,netzimme/mbed-os,Sweet-Peas/mbed,Shengliang/mbed,jpbrucker/mbed,nvlsianpu/mbed,svogl/mbed-os,Timmmm/mbed,pi19404/mbed,bremoran/mbed-drivers,maximmbed/mbed,mikaleppanen/mbed-os,jferreir/mbed,alertby/mbed,getopenmono/mbed,jamesadevine/mbed,HeadsUpDisplayInc/mbed,kl-cruz/mbed-os,al177/mbed,FranklyDev/mbed,pbrook/mbed,netzimme/mbed-os,screamerbg/mbed,sam-geek/mbed,arostm/mbed-os,pradeep-gr/mbed-os5-onsemi,wodji/mbed,wodji/mbed,karsev/mbed-os,adamgreen/mbed,kl-cruz/mbed-os,betzw/mbed-os,struempelix/mbed,svogl/mbed-os,al177/mbed,ryankurte/mbed-os,dbestm/mbed,wodji/mbed,al177/mbed,Shengliang/mbed,pradeep-gr/mbed-os5-onsemi,tung7970/mbed-os,Marcomissyou/mbed,mnlipp/mbed,bcostm/mbed-os,infinnovation/mbed-os,mikaleppanen/mbed-os,FranklyDev/mbed,tung7970/mbed-os-1,HeadsUpDisplayInc/mbed,radhika-raghavendran/mbed-os5.1-onsemi,catiedev/mbed-os,nRFMesh/mbed-os,cvtsi2sd/mbed-os,mazimkhan/mbed-os,tung7970/mbed-os,masaohamanaka/mbed,rgrover/mbed,ban4jp/mbed,cvtsi2sd/mbed-os,GustavWi/mbed,Shengliang/mbed,bentwire/mbed,Willem23/mbed,sam-geek/mbed,naves-thiago/mbed-midi,naves-thiago/mbed-midi,rgrover/mbed,fanghuaqi/mbed,geky/mbed,adamgreen/mbed,pedromes/mbed,pedromes/mbed,pedromes/mbed,struempelix/mbed,sg-/mbed-drivers,naves-thiago/mbed-midi,dbestm/mbed,NitinBhaskar/mbed,ryankurte/mbed-os,al177/mbed,sam-geek/mbed,Sweet-Peas/mbed,hwfwgrp/mbed,bremoran/mbed-drivers,Tiryoh/mbed,RonEld/mbed,adamgreen/mbed,0xc0170/mbed-drivers,jrjang/mbed,Marcomissyou/mbed,maximmbed/mbed,maximmbed/mbed,radhika-raghavendran/mbed-os5.1-onsemi,jrjang/mbed,mikaleppanen/mbed-os,jferreir/mbed,GustavWi/mbed,netzimme/mbed-os,jeremybrodt/mbed,alertby/mbed,jamesadevine/mbed,Archcady/mbed-os,K4zuki/mbed,rosterloh/mbed,xcrespo/mbed,screamerbg/mbed,ban4jp/mbed,mmorenobarm/mbed-os,rgrover/mbed,kpurusho/mbed,Shengliang/mbed,mbedmicro/mbed,NitinBhaskar/mbed,nabilbendafi/mbed,devanlai/mbed,sg-/mbed-drivers,ARM-software/mbed-beetle,betzw/mbed-os,theotherjimmy/mbed,masaohamanaka/mbed,svastm/mbed,c1728p9/mbed-os,fvincenzo/mbed-os,fpiot/mbed-ats,betzw/mbed-os,Timmmm/mbed,fvincenzo/mbed-os,andreaslarssonublox/mbed,kpurusho/mbed,tung7970/mbed-os-1,CalSol/mbed,nRFMesh/mbed-os,dbestm/mbed,jpbrucker/mbed,geky/mbed,JasonHow44/mbed,nvlsianpu/mbed,struempelix/mbed,HeadsUpDisplayInc/mbed,xcrespo/mbed,kpurusho/mbed,devanlai/mbed,theotherjimmy/mbed,RonEld/mbed,jrjang/mbed,hwfwgrp/mbed,fpiot/mbed-ats,hwfwgrp/mbed,tung7970/mbed-os,adustm/mbed,pradeep-gr/mbed-os5-onsemi,maximmbed/mbed,JasonHow44/mbed,geky/mbed,wodji/mbed,FranklyDev/mbed,xcrespo/mbed,monkiineko/mbed-os,JasonHow44/mbed,GustavWi/mbed,pbrook/mbed,pbrook/mbed,pradeep-gr/mbed-os5-onsemi,pbrook/mbed,Timmmm/mbed,brstew/MBED-BUILD,jferreir/mbed,devanlai/mbed,jrjang/mbed,masaohamanaka/mbed,tung7970/mbed-os-1,NXPmicro/mbed,pedromes/mbed,larks/mbed,iriark01/mbed-drivers,NitinBhaskar/mbed,ARM-software/mbed-beetle,EmuxEvans/mbed,pi19404/mbed,bikeNomad/mbed,al177/mbed,geky/mbed,Tiryoh/mbed,kjbracey-arm/mbed,betzw/mbed-os,0xc0170/mbed-drivers,mbedmicro/mbed,FranklyDev/mbed,adustm/mbed,alertby/mbed,mazimkhan/mbed-os,nabilbendafi/mbed,mmorenobarm/mbed-os,karsev/mbed-os,kjbracey-arm/mbed,dbestm/mbed,c1728p9/mbed-os,Willem23/mbed,CalSol/mbed,tung7970/mbed-os-1,monkiineko/mbed-os,bikeNomad/mbed,larks/mbed,fanghuaqi/mbed,karsev/mbed-os,struempelix/mbed,bcostm/mbed-os,Archcady/mbed-os,JasonHow44/mbed,brstew/MBED-BUILD,pi19404/mbed,j-greffe/mbed-os,mbedmicro/mbed,dbestm/mbed,YarivCol/mbed-os,kl-cruz/mbed-os,pedromes/mbed,Marcomissyou/mbed,Tiryoh/mbed,ban4jp/mbed,alertby/mbed,theotherjimmy/mbed,CalSol/mbed,brstew/MBED-BUILD,dbestm/mbed,mikaleppanen/mbed-os,c1728p9/mbed-os,bulislaw/mbed-os,fahhem/mbed-os,monkiineko/mbed-os,FranklyDev/mbed,al177/mbed,logost/mbed,nRFMesh/mbed-os,autopulated/mbed,NXPmicro/mbed,kl-cruz/mbed-os,naves-thiago/mbed-midi,andreaslarssonublox/mbed,fahhem/mbed-os,jpbrucker/mbed,alertby/mbed,hwfwgrp/mbed,bulislaw/mbed-os,K4zuki/mbed,Willem23/mbed,nRFMesh/mbed-os,jamesadevine/mbed,adamgreen/mbed,Tiryoh/mbed,radhika-raghavendran/mbed-os5.1-onsemi,tung7970/mbed-os,autopulated/mbed,larks/mbed,DanKupiniak/mbed,nvlsianpu/mbed,c1728p9/mbed-os,logost/mbed,betzw/mbed-os,j-greffe/mbed-os,cvtsi2sd/mbed-os,Willem23/mbed,mazimkhan/mbed-os,fanghuaqi/mbed,infinnovation/mbed-os,kpurusho/mbed,bentwire/mbed,nabilbendafi/mbed,fvincenzo/mbed-os,bentwire/mbed,j-greffe/mbed-os,fpiot/mbed-ats,iriark01/mbed-drivers,fahhem/mbed-os,larks/mbed,NXPmicro/mbed,sam-geek/mbed,karsev/mbed-os,kjbracey-arm/mbed,mikaleppanen/mbed-os,fanghuaqi/mbed,jeremybrodt/mbed,cvtsi2sd/mbed-os,jferreir/mbed,brstew/MBED-BUILD,svogl/mbed-os,adustm/mbed,mmorenobarm/mbed-os,K4zuki/mbed,fpiot/mbed-ats,Timmmm/mbed,RonEld/mbed,DanKupiniak/mbed,andcor02/mbed-os,Marcomissyou/mbed,K4zuki/mbed,sam-geek/mbed,karsev/mbed-os,hwfwgrp/mbed,Tiryoh/mbed,j-greffe/mbed-os,Sweet-Peas/mbed,infinnovation/mbed-os,ryankurte/mbed-os,hwfwgrp/mbed,RonEld/mbed,adustm/mbed,logost/mbed,Sweet-Peas/mbed,Marcomissyou/mbed,andcor02/mbed-os,naves-thiago/mbed-midi,xcrespo/mbed,devanlai/mbed,nvlsianpu/mbed,getopenmono/mbed,maximmbed/mbed,RonEld/mbed,mazimkhan/mbed-os,masaohamanaka/mbed,jamesadevine/mbed,pi19404/mbed,catiedev/mbed-os,jeremybrodt/mbed,theotherjimmy/mbed,ryankurte/mbed-os,fpiot/mbed-ats,j-greffe/mbed-os,Timmmm/mbed,rgrover/mbed,jpbrucker/mbed,ban4jp/mbed,fvincenzo/mbed-os,catiedev/mbed-os,mnlipp/mbed,screamerbg/mbed,mazimkhan/mbed-os,ryankurte/mbed-os,ban4jp/mbed,svogl/mbed-os,nabilbendafi/mbed,getopenmono/mbed,pi19404/mbed,andcor02/mbed-os,rosterloh/mbed,YarivCol/mbed-os,bulislaw/mbed-os,JasonHow44/mbed,nRFMesh/mbed-os,getopenmono/mbed,fahhem/mbed-os,mikaleppanen/mbed-os,brstew/MBED-BUILD,radhika-raghavendran/mbed-os5.1-onsemi,logost/mbed,adustm/mbed,bcostm/mbed-os,catiedev/mbed-os,svogl/mbed-os,kjbracey-arm/mbed,andreaslarssonublox/mbed,geky/mbed,autopulated/mbed,arostm/mbed-os,NXPmicro/mbed,wodji/mbed,theotherjimmy/mbed,CalSol/mbed,tung7970/mbed-os,logost/mbed,karsev/mbed-os,mnlipp/mbed,andreaslarssonublox/mbed,NXPmicro/mbed,getopenmono/mbed,mnlipp/mbed,kpurusho/mbed,ARM-software/mbed-beetle,svastm/mbed,rosterloh/mbed,svastm/mbed,tung7970/mbed-os-1,radhika-raghavendran/mbed-os5.1-onsemi,CalSol/mbed,netzimme/mbed-os,Marcomissyou/mbed,GustavWi/mbed,rosterloh/mbed,YarivCol/mbed-os,bentwire/mbed,Archcady/mbed-os,cvtsi2sd/mbed-os,kl-cruz/mbed-os,maximmbed/mbed,screamerbg/mbed,adamgreen/mbed,pbrook/mbed,ARM-software/mbed-beetle,xcrespo/mbed,EmuxEvans/mbed,pedromes/mbed,svastm/mbed,screamerbg/mbed,netzimme/mbed-os,kl-cruz/mbed-os,pradeep-gr/mbed-os5-onsemi,c1728p9/mbed-os,EmuxEvans/mbed,Shengliang/mbed,bikeNomad/mbed,jferreir/mbed,devanlai/mbed,NitinBhaskar/mbed,fpiot/mbed-ats,bcostm/mbed-os,devanlai/mbed,NXPmicro/mbed,DanKupiniak/mbed,netzimme/mbed-os,mmorenobarm/mbed-os,HeadsUpDisplayInc/mbed,monkiineko/mbed-os,YarivCol/mbed-os,ryankurte/mbed-os,HeadsUpDisplayInc/mbed,radhika-raghavendran/mbed-os5.1-onsemi,Tiryoh/mbed,EmuxEvans/mbed,catiedev/mbed-os,jrjang/mbed,rosterloh/mbed,CalSol/mbed,Willem23/mbed,j-greffe/mbed-os,arostm/mbed-os,cvtsi2sd/mbed-os,bentwire/mbed,bikeNomad/mbed,YarivCol/mbed-os,larks/mbed,mbedmicro/mbed,jferreir/mbed,YarivCol/mbed-os,bulislaw/mbed-os,JasonHow44/mbed,naves-thiago/mbed-midi,nvlsianpu/mbed,pbrook/mbed,ban4jp/mbed,arostm/mbed-os,catiedev/mbed-os,kpurusho/mbed,DanKupiniak/mbed,mnlipp/mbed,rgrover/mbed,jeremybrodt/mbed,pi19404/mbed