A couple of minor fixes in NativeToJsBridge (#151)

Author: mganandraj

ReactCommon/cxxreact/NativeToJsBridge.cpp

@@ -181,7 +181,6 @@ void NativeToJsBridge::callFunction(
       #else
       (void)(systraceCookie);
       #endif
-      SystraceSection s("NativeToJsBridge::callFunction", "module", module, "method", method);
       // This is safe because we are running on the executor's thread: it won't
       // destruct until after it's been unregistered (which we check above) and
       // that will happen on this thread

ReactCommon/cxxreact/NativeToJsBridge.h

@@ -114,7 +114,7 @@ class NativeToJsBridge {
   bool m_applicationScriptHasFailure = false;
 
   #ifdef WITH_FBSYSTRACE
-  std::atomic_uint_least32_t m_systraceCookie = ATOMIC_VAR_INIT();
+  std::atomic_uint_least32_t m_systraceCookie{};
   #endif
 };