[shared_preferences] Remove SetPixelRatio

packages/shared_preferences/shared_preferences_aurora/example/aurora/main.cpp

@@ -7,7 +7,6 @@
 
 int main(int argc, char *argv[]) {
     Application::Initialize(argc, argv);
-    Application::SetPixelRatio(1.8);
     RegisterPlugins();
     Application::Launch();
     return 0;