Narrow .gitignore to only what it needs to ignore
Narrow .gitignore to only what it needs to ignore

"proto" and "*.egg-info/" are no longer generated, "src/" can be
narrowed to "/src/", and "*_pb2.py" and "*_pb2_grpc.py" are covered by
.gitignore files in parent directories.

kpayson64/grpc,stanley-cheung/grpc,kpayson64/grpc,daniel-j-born/grpc,jboeuf/grpc,muxi/grpc,pszemus/grpc,jboeuf/grpc,fuchsia-mirror/third_party-grpc,fuchsia-mirror/third_party-grpc,deepaklukose/grpc,stanley-cheung/grpc,muxi/grpc,pszemus/grpc,grpc/grpc,chrisdunelm/grpc,ctiller/grpc,murgatroid99/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,yongni/grpc,donnadionne/grpc,adelez/grpc,mehrdada/grpc,Vizerai/grpc,chrisdunelm/grpc,firebase/grpc,mehrdada/grpc,chrisdunelm/grpc,ctiller/grpc,jboeuf/grpc,thinkerou/grpc,stanley-cheung/grpc,fuchsia-mirror/third_party-grpc,kumaralokgithub/grpc,Vizerai/grpc,vjpai/grpc,Crevil/grpc,sreecha/grpc,ejona86/grpc,stanley-cheung/grpc,donnadionne/grpc,mehrdada/grpc,donnadionne/grpc,vjpai/grpc,kpayson64/grpc,vjpai/grpc,mehrdada/grpc,nicolasnoble/grpc,dgquintas/grpc,fuchsia-mirror/third_party-grpc,grpc/grpc,deepaklukose/grpc,fuchsia-mirror/third_party-grpc,ncteisen/grpc,Vizerai/grpc,murgatroid99/grpc,sreecha/grpc,dgquintas/grpc,Crevil/grpc,murgatroid99/grpc,geffzhang/grpc,nicolasnoble/grpc,ejona86/grpc,firebase/grpc,deepaklukose/grpc,jboeuf/grpc,jboeuf/grpc,carl-mastrangelo/grpc,nicolasnoble/grpc,jboeuf/grpc,Vizerai/grpc,pszemus/grpc,ejona86/grpc,murgatroid99/grpc,vjpai/grpc,firebase/grpc,yongni/grpc,PeterFaiman/ruby-grpc-minimal,firebase/grpc,grpc/grpc,ejona86/grpc,carl-mastrangelo/grpc,grpc/grpc,ejona86/grpc,muxi/grpc,yongni/grpc,murgatroid99/grpc,jtattermusch/grpc,Vizerai/grpc,kumaralokgithub/grpc,chrisdunelm/grpc,donnadionne/grpc,sreecha/grpc,ejona86/grpc,dgquintas/grpc,nicolasnoble/grpc,vjpai/grpc,mehrdada/grpc,mehrdada/grpc,vjpai/grpc,mehrdada/grpc,mehrdada/grpc,murgatroid99/grpc,ncteisen/grpc,adelez/grpc,pszemus/grpc,deepaklukose/grpc,carl-mastrangelo/grpc,simonkuang/grpc,vjpai/grpc,stanley-cheung/grpc,dgquintas/grpc,simonkuang/grpc,jboeuf/grpc,daniel-j-born/grpc,matt-kwong/grpc,adelez/grpc,ejona86/grpc,PeterFaiman/ruby-grpc-minimal,muxi/grpc,donnadionne/grpc,grpc/grpc,kpayson64/grpc,muxi/grpc,murgatroid99/grpc,Crevil/grpc,nicolasnoble/grpc,jtattermusch/grpc,sreecha/grpc,vjpai/grpc,stanley-cheung/grpc,ctiller/grpc,jtattermusch/grpc,ncteisen/grpc,yongni/grpc,jtattermusch/grpc,kskalski/grpc,grpc/grpc,kumaralokgithub/grpc,daniel-j-born/grpc,geffzhang/grpc,ncteisen/grpc,jtattermusch/grpc,fuchsia-mirror/third_party-grpc,ejona86/grpc,sreecha/grpc,PeterFaiman/ruby-grpc-minimal,carl-mastrangelo/grpc,simonkuang/grpc,daniel-j-born/grpc,ctiller/grpc,carl-mastrangelo/grpc,kumaralokgithub/grpc,donnadionne/grpc,jboeuf/grpc,PeterFaiman/ruby-grpc-minimal,quizlet/grpc,ejona86/grpc,Crevil/grpc,muxi/grpc,stanley-cheung/grpc,quizlet/grpc,vjpai/grpc,adelez/grpc,sreecha/grpc,donnadionne/grpc,chrisdunelm/grpc,carl-mastrangelo/grpc,kskalski/grpc,fuchsia-mirror/third_party-grpc,jboeuf/grpc,stanley-cheung/grpc,daniel-j-born/grpc,pszemus/grpc,quizlet/grpc,thinkerou/grpc,kpayson64/grpc,ncteisen/grpc,jtattermusch/grpc,quizlet/grpc,yongni/grpc,firebase/grpc,carl-mastrangelo/grpc,donnadionne/grpc,pszemus/grpc,Crevil/grpc,Crevil/grpc,chrisdunelm/grpc,thinkerou/grpc,dgquintas/grpc,thinkerou/grpc,kpayson64/grpc,geffzhang/grpc,Vizerai/grpc,pszemus/grpc,Vizerai/grpc,kumaralokgithub/grpc,kpayson64/grpc,ctiller/grpc,simonkuang/grpc,chrisdunelm/grpc,matt-kwong/grpc,deepaklukose/grpc,geffzhang/grpc,stanley-cheung/grpc,ctiller/grpc,geffzhang/grpc,jtattermusch/grpc,geffzhang/grpc,muxi/grpc,donnadionne/grpc,sreecha/grpc,geffzhang/grpc,carl-mastrangelo/grpc,dgquintas/grpc,kpayson64/grpc,firebase/grpc,sreecha/grpc,Vizerai/grpc,nicolasnoble/grpc,thinkerou/grpc,ejona86/grpc,Crevil/grpc,simonkuang/grpc,kskalski/grpc,firebase/grpc,ctiller/grpc,yongni/grpc,dgquintas/grpc,nicolasnoble/grpc,quizlet/grpc,kskalski/grpc,thinkerou/grpc,pszemus/grpc,matt-kwong/grpc,deepaklukose/grpc,sreecha/grpc,ncteisen/grpc,jtattermusch/grpc,deepaklukose/grpc,simonkuang/grpc,kumaralokgithub/grpc,ncteisen/grpc,deepaklukose/grpc,PeterFaiman/ruby-grpc-minimal,pszemus/grpc,chrisdunelm/grpc,ncteisen/grpc,ejona86/grpc,kskalski/grpc,pszemus/grpc,thinkerou/grpc,ncteisen/grpc,murgatroid99/grpc,fuchsia-mirror/third_party-grpc,matt-kwong/grpc,thinkerou/grpc,PeterFaiman/ruby-grpc-minimal,vjpai/grpc,matt-kwong/grpc,grpc/grpc,quizlet/grpc,grpc/grpc,jtattermusch/grpc,donnadionne/grpc,PeterFaiman/ruby-grpc-minimal,kskalski/grpc,adelez/grpc,simonkuang/grpc,PeterFaiman/ruby-grpc-minimal,muxi/grpc,grpc/grpc,stanley-cheung/grpc,nicolasnoble/grpc,muxi/grpc,nicolasnoble/grpc,carl-mastrangelo/grpc,quizlet/grpc,mehrdada/grpc,deepaklukose/grpc,adelez/grpc,carl-mastrangelo/grpc,stanley-cheung/grpc,chrisdunelm/grpc,firebase/grpc,quizlet/grpc,nicolasnoble/grpc,mehrdada/grpc,thinkerou/grpc,chrisdunelm/grpc,ctiller/grpc,kskalski/grpc,ncteisen/grpc,thinkerou/grpc,firebase/grpc,dgquintas/grpc,simonkuang/grpc,chrisdunelm/grpc,vjpai/grpc,PeterFaiman/ruby-grpc-minimal,adelez/grpc,adelez/grpc,kpayson64/grpc,kskalski/grpc,thinkerou/grpc,PeterFaiman/ruby-grpc-minimal,muxi/grpc,geffzhang/grpc,quizlet/grpc,sreecha/grpc,sreecha/grpc,vjpai/grpc,jtattermusch/grpc,ctiller/grpc,ncteisen/grpc,daniel-j-born/grpc,adelez/grpc,firebase/grpc,kskalski/grpc,matt-kwong/grpc,dgquintas/grpc,carl-mastrangelo/grpc,fuchsia-mirror/third_party-grpc,daniel-j-born/grpc,Vizerai/grpc,matt-kwong/grpc,nicolasnoble/grpc,Vizerai/grpc,Crevil/grpc,kpayson64/grpc,muxi/grpc,mehrdada/grpc,dgquintas/grpc,ncteisen/grpc,kpayson64/grpc,fuchsia-mirror/third_party-grpc,matt-kwong/grpc,muxi/grpc,ctiller/grpc,Crevil/grpc,geffzhang/grpc,firebase/grpc,sreecha/grpc,daniel-j-born/grpc,donnadionne/grpc,jtattermusch/grpc,kumaralokgithub/grpc,murgatroid99/grpc,carl-mastrangelo/grpc,dgquintas/grpc,jboeuf/grpc,yongni/grpc,donnadionne/grpc,simonkuang/grpc,ctiller/grpc,daniel-j-born/grpc,murgatroid99/grpc,mehrdada/grpc,matt-kwong/grpc,yongni/grpc,kumaralokgithub/grpc,pszemus/grpc,stanley-cheung/grpc,ejona86/grpc,grpc/grpc,kumaralokgithub/grpc,firebase/grpc,ctiller/grpc,pszemus/grpc,thinkerou/grpc,nicolasnoble/grpc,Vizerai/grpc,yongni/grpc,jboeuf/grpc,jboeuf/grpc