Revert "Ensure app run as single instance"
Revert "Ensure app run as single instance"

This reverts commit 58f506e0ee741cb92fac0761bdc4d1144eb0f0c5.

It will broke rndebugger-open.

jhen0409/react-native-debugger,jhen0409/react-native-debugger,jhen0409/react-native-debugger