Remove lib/codereview.
Remove lib/codereview.

tamird/protobuf-2,adnaan/protobuf,velocity-toolkit/protobuf-1,fuchsia-mirror/third_party-github.com-golang-protobuf,ekle/protoc-gen-goweb_test,kung-foo/protobuf,hailocab/protobuf,mwitkow-io/protobuf,linkedin-inc/protobuf,francoishill/protobuf,aoeu/protobuf,golang/protobuf,qinlodestar/protobuf,skyportsystems/go-protobuf,ekle/protoc-gen-goweb,daemonl/protobuf,ArtemTeleshev/go-protobuf,fuchsia-mirror/third_party-github.com-golang-protobuf,jeremyletang/protobuf,jrbarron/protobuf,alskjstl/protobuf,csuideal/protobuf,tamird/protobuf-2,golang/protobuf,eduardiazf/protobuf,trdata/protobuf,skyportsystems/go-protobuf,jmptrader/protobuf-1,trdata/protobuf