delete mobile config react_native_new_architecture:suspend_before_app_termination

Summary:
changelog: [internal]

Remove shipped mobile config

Reviewed By: mdvacca

Differential Revision: D37913252

fbshipit-source-id: f1557e2b93b7f0410385e4dec41ec354e46d04f1

React/Fabric/RCTSurfacePresenter.mm

@@ -98,13 +98,10 @@ static BackgroundExecutor RCTGetBackgroundExecutor()
 
     _scheduler = [self _createScheduler];
 
-    auto reactNativeConfig = _contextContainer->at<std::shared_ptr<ReactNativeConfig const>>("ReactNativeConfig");
-    if (reactNativeConfig->getBool("react_native_new_architecture:suspend_before_app_termination")) {
-      [[NSNotificationCenter defaultCenter] addObserver:self
-                                               selector:@selector(_applicationWillTerminate)
-                                                   name:UIApplicationWillTerminateNotification
-                                                 object:nil];
-    }
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(_applicationWillTerminate)
+                                                 name:UIApplicationWillTerminateNotification
+                                               object:nil];
   }
 
   return self;