Merge pull request #15350 from ericgribkoff/remove_no_op_string

chttp2_transport: remove unused string

src/core/ext/transport/chttp2/transport/chttp2_transport.cc

@@ -1801,8 +1801,11 @@ static void perform_transport_op_locked(void* stream_op,
 
 static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
   grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
+  if (grpc_http_trace.enabled()) {
     char* msg = grpc_transport_op_string(op);
+    gpr_log(GPR_INFO, "perform_transport_op[t=%p]: %s", t, msg);
     gpr_free(msg);
+  }
   op->handler_private.extra_arg = gt;
   GRPC_CHTTP2_REF_TRANSPORT(t, "transport_op");
   GRPC_CLOSURE_SCHED(GRPC_CLOSURE_INIT(&op->handler_private.closure,