Revert "Support HttpRule with field response"

[ivucica]

Reverts #712

We should roll forward only once these blockers are resolved:

• Please sync google/api/http.proto from github.com/googleapis/googleapis googleapis/go-genproto#92
• Can someone sync google/api/http.proto? googleapis/api-common-protos#11

[ivucica]

FYI @doroginin @johanbrandhorst @achew22 I will roll this back immediately because we can easily roll forward once it's not friday.

[johanbrandhorst]

@ivucica LGTM

[achew22]

LGTM. Let's not break weekend hackers

[ivucica]

Alright, the change to googleapis/api-common-protos has been merged already!

Looks like someone "just" needs to regenerate code in go-genproto and we may not need to merge this. I'll give it ~1.5h and then merge this rollback.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@e679739). Click here to learn what that means.
The diff coverage is 75%.

@@            Coverage Diff            @@
##             master     #730   +/-   ##
=========================================
  Coverage          ?   56.29%           
=========================================
  Files             ?       30           
  Lines             ?     3121           
  Branches          ?        0           
=========================================
  Hits              ?     1757           
  Misses            ?     1193           
  Partials          ?      171

Impacted Files	Coverage Δ
protoc-gen-grpc-gateway/gengateway/template.go	55.76% <ø> (ø)
runtime/mux.go	44.16% <ø> (ø)
protoc-gen-grpc-gateway/descriptor/types.go	49.07% <ø> (ø)
protoc-gen-grpc-gateway/descriptor/registry.go	71.03% <ø> (ø)
protoc-gen-swagger/main.go	27.38% <ø> (ø)
runtime/handler.go	43.33% <0%> (ø)
protoc-gen-grpc-gateway/descriptor/services.go	75.54% <100%> (ø)
protoc-gen-swagger/genswagger/template.go	39.39% <83.33%> (ø)

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[johanbrandhorst]

@ivucica I got in touch with @jadekler, he says this should be fixed?

[johanbrandhorst]

Looks like we can close this?

[ivucica]

Done