Back out "Close RocketClientChannel in resetClient()"

Summary:
This diff didn't actually do anything since this function is specified via codegen

Original commit changeset: e1b0c4a4ac5d

Original Phabricator Diff: D51030792

Reviewed By: stuclar

Differential Revision: D52546992

fbshipit-source-id: 9121a37dc9a6c871492745002dd4b7893b624318

mcrouter/lib/network/ThriftTransport.h

@@ -145,9 +145,7 @@ class ThriftTransport : public ThriftTransportBase {
         "Router ", RouterInfo::name, " does not support thrift transport"));
   }
 
-  void resetClient() override final {
-    channel_->closeNow();
-  }
+  void resetClient() override final {}
 
   void setFlushList(FlushList* /* flushList */) override final {}
 };