Remove MOZ_WIDGET_GONK [1/2]

Tag #288

xpcom/threads/ThreadStackHelper.cpp

@@ -359,11 +359,6 @@ ThreadStackHelper::PrepareStackBuffer(Stack& aStack)
      profiler_register_thread). However, on B2G, profiling secondary threads
      may be disabled despite profiler being enabled. This is by-design and
      is not an error. */
-#ifdef MOZ_WIDGET_GONK
-  if (!mPseudoStack) {
-    return false;
-  }
-#endif
   MOZ_ASSERT(mPseudoStack);
   if (!aStack.reserve(mMaxStackSize) ||
       !aStack.reserve(aStack.capacity()) || // reserve up to the capacity