Merge pull request #9653 from grpc/revert-9606-port-9488

Revert "Port #9488 and part of #9463"
diff --git "a/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec" "b/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
index 1a3b775..3429e2b 100644
--- "a/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
+++ "b/src/objective-c/\041ProtoCompiler-gRPCPlugin.podspec"
@@ -101,7 +101,7 @@
   s.preserve_paths = plugin
 
   # Restrict the protoc version to the one supported by this plugin.
-  s.dependency '!ProtoCompiler', '3.1.0'
+  s.dependency '!ProtoCompiler', '3.0.2'
   # For the Protobuf dependency not to complain:
   s.ios.deployment_target = '7.1'
   s.osx.deployment_target = '10.9'
diff --git "a/src/objective-c/\041ProtoCompiler.podspec" "b/src/objective-c/\041ProtoCompiler.podspec"
index dc4d8e9..b55f6c9 100644
--- "a/src/objective-c/\041ProtoCompiler.podspec"
+++ "b/src/objective-c/\041ProtoCompiler.podspec"
@@ -36,7 +36,7 @@
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler'
-  v = '3.1.0'
+  v = '3.0.2'
   s.version  = v
   s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
   s.description = <<-DESC