Merge pull request #380 from grpc/revert-372-bugfix/fix_stream_codec_errors

Revert "fix difference between unitary and stream codec error handling"

rpc_util.go

@@ -187,9 +187,6 @@ func recv(p *parser, c Codec, m interface{}) error {
 	switch pf {
 	case compressionNone:
 		if err := c.Unmarshal(d, m); err != nil {
-			if rErr, ok := err.(rpcError); ok {
-				return rErr
-			} else {
 			return Errorf(codes.Internal, "grpc: %v", err)
 		}
 	default: