iOS Logbox: always return a turbomodule instance

Summary:
We have assertion to ensure that `getTurboModuleWithJsInvoker:` returns non-nullptr, so conditionally returning `nullptr` is not going to work.

Changelog: [Internal]

Reviewed By: sammy-SC

Differential Revision: D19103125

fbshipit-source-id: 663850c01e4db40cca96d254950ea5a7bf6b96b7

React/CoreModules/RCTLogBox.mm

@@ -117,11 +117,7 @@ + (BOOL)requiresMainQueueSetup
 
 - (std::shared_ptr<facebook::react::TurboModule>)getTurboModuleWithJsInvoker:(std::shared_ptr<facebook::react::CallInvoker>)jsInvoker
 {
-  if (RCTRedBoxGetEnabled()) {
-    return std::make_shared<facebook::react::NativeLogBoxSpecJSI>(self, jsInvoker);
-  }
-
-  return nullptr;
+  return std::make_shared<facebook::react::NativeLogBoxSpecJSI>(self, jsInvoker);
 }
 
 @end