Revert D5446953: [react-native] Conditionally export JSTimers

Differential Revision: D5446953

fbshipit-source-id: 8275e1b71b8fac9b120c8ddff486f9cd88b7939d

Libraries/BatchedBridge/__mocks__/MessageQueueTestConfig.js

@@ -12,7 +12,6 @@
 var remoteModulesConfig = [
   ['RemoteModule1',null,['remoteMethod','promiseMethod'],[]],
   ['RemoteModule2',null,['remoteMethod','promiseMethod'],[]],
-  ['Timing',null,['callImmediates']],
 ];
 
 var MessageQueueTestConfig = {

Libraries/Core/Timers/JSTimers.js

@@ -478,10 +478,4 @@ const JSTimers = {
   },
 };
 
-if (!Timing) {
-  console.warn("Timing native module is not available, can't set timers.");
-  // $FlowFixMe: we can assume timers are generally available
-  module.exports = ({}: typeof JSTimers);
-} else {
-  module.exports = JSTimers;
-}
+module.exports = JSTimers;