[cleanup] Remove unnecessary string conversion (#33123)

src/core/ext/filters/client_channel/client_channel.cc

@@ -1496,8 +1496,8 @@ void ClientChannel::CreateResolverLocked() {
             uri_to_resolve_.c_str());
   }
   resolver_ = CoreConfiguration::Get().resolver_registry().CreateResolver(
-      uri_to_resolve_.c_str(), channel_args_, interested_parties_,
-      work_serializer_, std::make_unique<ResolverResultHandler>(this));
+      uri_to_resolve_, channel_args_, interested_parties_, work_serializer_,
+      std::make_unique<ResolverResultHandler>(this));
   // Since the validity of the args was checked when the channel was created,
   // CreateResolver() must return a non-null result.
   GPR_ASSERT(resolver_ != nullptr);