Cleanup initialization of native modules in FBReactModule

Reviewed By: shergin

Differential Revision: D5111768

fbshipit-source-id: 9ad682b51ad34516576b6403220bb7d2870e0192

React/Modules/RCTExceptionsManager.h

@@ -25,6 +25,8 @@
 
 - (instancetype)initWithDelegate:(id<RCTExceptionsManagerDelegate>)delegate;
 
+@property (nonatomic, weak) id<RCTExceptionsManagerDelegate> delegate;
+
 @property (nonatomic, assign) NSUInteger maxReloadAttempts;
 
 @end

React/Modules/RCTExceptionsManager.m

@@ -16,9 +16,6 @@
 #import "RCTRootView.h"
 
 @implementation RCTExceptionsManager
-{
-  __weak id<RCTExceptionsManagerDelegate> _delegate;
-}
 
 @synthesize bridge = _bridge;