Remove unused includes in application_service.cc
Remove unused includes in application_service.cc

We do not use hash_set in the file (we use base/ version)
but the style checker complains we should include it.
Instead we can silence the warning and remove the include. I also
took the opportunity to remove some other unused includes.

chuan9/crosswalk,marcuspridham/crosswalk,jondong/crosswalk,rakuco/crosswalk,PeterWangIntel/crosswalk,amaniak/crosswalk,alex-zhang/crosswalk,tedshroyer/crosswalk,minggangw/crosswalk,jondong/crosswalk,PeterWangIntel/crosswalk,lincsoon/crosswalk,dreamsxin/crosswalk,XiaosongWei/crosswalk,Pluto-tv/crosswalk,jondong/crosswalk,axinging/crosswalk,weiyirong/crosswalk-1,alex-zhang/crosswalk,hgl888/crosswalk,RafuCater/crosswalk,jondwillis/crosswalk,jpike88/crosswalk,weiyirong/crosswalk-1,zeropool/crosswalk,tedshroyer/crosswalk,jondong/crosswalk,pk-sam/crosswalk,minggangw/crosswalk,jpike88/crosswalk,weiyirong/crosswalk-1,XiaosongWei/crosswalk,PeterWangIntel/crosswalk,minggangw/crosswalk,amaniak/crosswalk,xzhan96/crosswalk,rakuco/crosswalk,zeropool/crosswalk,heke123/crosswalk,axinging/crosswalk,hgl888/crosswalk,marcuspridham/crosswalk,Bysmyyr/crosswalk,zliang7/crosswalk,stonegithubs/crosswalk,xzhan96/crosswalk,crosswalk-project/crosswalk,PeterWangIntel/crosswalk,Bysmyyr/crosswalk,amaniak/crosswalk,Bysmyyr/crosswalk,Bysmyyr/crosswalk,darktears/crosswalk,tedshroyer/crosswalk,crosswalk-project/crosswalk,ZhengXinCN/crosswalk,axinging/crosswalk,lincsoon/crosswalk,tedshroyer/crosswalk,lincsoon/crosswalk,Pluto-tv/crosswalk,siovene/crosswalk,heke123/crosswalk,weiyirong/crosswalk-1,darktears/crosswalk,marcuspridham/crosswalk,baleboy/crosswalk,jpike88/crosswalk,tomatell/crosswalk,minggangw/crosswalk,tomatell/crosswalk,bestwpw/crosswalk,stonegithubs/crosswalk,ZhengXinCN/crosswalk,baleboy/crosswalk,hgl888/crosswalk,jondong/crosswalk,crosswalk-project/crosswalk,ZhengXinCN/crosswalk,XiaosongWei/crosswalk,jpike88/crosswalk,jondong/crosswalk,dreamsxin/crosswalk,axinging/crosswalk,alex-zhang/crosswalk,Pluto-tv/crosswalk,xzhan96/crosswalk,xzhan96/crosswalk,ZhengXinCN/crosswalk,RafuCater/crosswalk,bestwpw/crosswalk,xzhan96/crosswalk,rakuco/crosswalk,RafuCater/crosswalk,zliang7/crosswalk,rakuco/crosswalk,jondong/crosswalk,crosswalk-project/crosswalk,zeropool/crosswalk,Bysmyyr/crosswalk,lincsoon/crosswalk,alex-zhang/crosswalk,alex-zhang/crosswalk,chuan9/crosswalk,PeterWangIntel/crosswalk,dreamsxin/crosswalk,Pluto-tv/crosswalk,hgl888/crosswalk,marcuspridham/crosswalk,chuan9/crosswalk,baleboy/crosswalk,chuan9/crosswalk,darktears/crosswalk,zeropool/crosswalk,xzhan96/crosswalk,heke123/crosswalk,ZhengXinCN/crosswalk,marcuspridham/crosswalk,ZhengXinCN/crosswalk,minggangw/crosswalk,bestwpw/crosswalk,amaniak/crosswalk,siovene/crosswalk,bestwpw/crosswalk,pk-sam/crosswalk,jpike88/crosswalk,baleboy/crosswalk,rakuco/crosswalk,darktears/crosswalk,tomatell/crosswalk,axinging/crosswalk,bestwpw/crosswalk,darktears/crosswalk,crosswalk-project/crosswalk,jpike88/crosswalk,stonegithubs/crosswalk,tedshroyer/crosswalk,lincsoon/crosswalk,ZhengXinCN/crosswalk,darktears/crosswalk,bestwpw/crosswalk,hgl888/crosswalk,tomatell/crosswalk,pk-sam/crosswalk,hgl888/crosswalk,RafuCater/crosswalk,jondwillis/crosswalk,jpike88/crosswalk,Bysmyyr/crosswalk,jondwillis/crosswalk,zliang7/crosswalk,Pluto-tv/crosswalk,siovene/crosswalk,tomatell/crosswalk,dreamsxin/crosswalk,marcuspridham/crosswalk,crosswalk-project/crosswalk,XiaosongWei/crosswalk,amaniak/crosswalk,heke123/crosswalk,siovene/crosswalk,zeropool/crosswalk,lincsoon/crosswalk,amaniak/crosswalk,stonegithubs/crosswalk,stonegithubs/crosswalk,heke123/crosswalk,tomatell/crosswalk,heke123/crosswalk,siovene/crosswalk,lincsoon/crosswalk,baleboy/crosswalk,Pluto-tv/crosswalk,siovene/crosswalk,marcuspridham/crosswalk,xzhan96/crosswalk,zeropool/crosswalk,chuan9/crosswalk,xzhan96/crosswalk,amaniak/crosswalk,rakuco/crosswalk,zeropool/crosswalk,tomatell/crosswalk,tedshroyer/crosswalk,weiyirong/crosswalk-1,axinging/crosswalk,dreamsxin/crosswalk,rakuco/crosswalk,heke123/crosswalk,heke123/crosswalk,pk-sam/crosswalk,zliang7/crosswalk,jondwillis/crosswalk,jondong/crosswalk,dreamsxin/crosswalk,RafuCater/crosswalk,pk-sam/crosswalk,Bysmyyr/crosswalk,axinging/crosswalk,lincsoon/crosswalk,zliang7/crosswalk,baleboy/crosswalk,weiyirong/crosswalk-1,bestwpw/crosswalk,dreamsxin/crosswalk,zliang7/crosswalk,pk-sam/crosswalk,hgl888/crosswalk,Bysmyyr/crosswalk,alex-zhang/crosswalk,stonegithubs/crosswalk,XiaosongWei/crosswalk,baleboy/crosswalk,jondwillis/crosswalk,chuan9/crosswalk,marcuspridham/crosswalk,pk-sam/crosswalk,RafuCater/crosswalk,XiaosongWei/crosswalk,siovene/crosswalk,crosswalk-project/crosswalk,chuan9/crosswalk,zliang7/crosswalk,alex-zhang/crosswalk,weiyirong/crosswalk-1,XiaosongWei/crosswalk,hgl888/crosswalk,darktears/crosswalk,jondwillis/crosswalk,rakuco/crosswalk,PeterWangIntel/crosswalk,stonegithubs/crosswalk,baleboy/crosswalk,minggangw/crosswalk,Pluto-tv/crosswalk,minggangw/crosswalk,zliang7/crosswalk,RafuCater/crosswalk,jondwillis/crosswalk,darktears/crosswalk,PeterWangIntel/crosswalk,crosswalk-project/crosswalk,tedshroyer/crosswalk,minggangw/crosswalk