Removed test code.

examples/00-helloworld/helloworld.cpp

@@ -45,9 +45,6 @@ int _main_(int _argc, char** _argv)
 		// Advance to next frame. Rendering thread will be kicked to 
 		// process submitted rendering primitives.
 		bgfx::frame();
-
-		extern void emscripten_yield();
-		emscripten_yield();
 	}
 
 	// Shutdown bgfx.