[ReactNative] backout orange box

Summary:
@public

This probably needs more thought - might want to differentiate between console.error and reportError.

Test Plan: console.error and reportError no longer redbox.  invariant and RCTLogError still do.

React/Base/RCTLog.m

@@ -171,9 +171,6 @@ void _RCTLogFormat(
 
       // Log to red box
       if (level >= RCTLOG_REDBOX_LEVEL) {
-        if (level < RCTLOG_FATAL_LEVEL) {
-          [[RCTRedBox sharedInstance] setNextBackgroundColor:[UIColor colorWithRed:0.9 green:0.4 blue:0.2 alpha:1]];
-        }
         [[RCTRedBox sharedInstance] showErrorMessage:message];
       }
 

React/Modules/RCTExceptionsManager.m

@@ -44,9 +44,7 @@ RCT_EXPORT_METHOD(reportSoftException:(NSString *)message
     [_delegate handleSoftJSExceptionWithMessage:message stack:stack];
     return;
   }
-  RCTRedBox *box = [RCTRedBox sharedInstance];
-  [box setNextBackgroundColor:[UIColor colorWithRed:0.9 green:0.4 blue:0.2 alpha:1]];
-  [box showErrorMessage:message withStack:stack];
+  [[RCTRedBox sharedInstance] showErrorMessage:message withStack:stack];
 }
 
 RCT_EXPORT_METHOD(reportFatalException:(NSString *)message