iOS new architecture: disallow disabling enforcement when RCT_NEW_ARCHITECTURE is defined

Summary: Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D28080430

fbshipit-source-id: 3e89be8419776c4a6da9dd9e8c6c5501c8f6c304

React/Base/RCTAssert.m

@@ -243,7 +243,11 @@ static BOOL newArchitectureViolationReporting = NO;
 
 void RCTEnableNewArchitectureViolationReporting(BOOL enabled)
 {
+#if RCT_NEW_ARCHITECTURE
+  // Cannot disable the reporting in this mode.
+#else
   newArchitectureViolationReporting = enabled;
+#endif
 }
 
 static NSString *getNewArchitectureViolationMessage(id context, NSString *extra)