Converted mains.

Author: Junyu11111

src/main/java/flashcardRemover/FcRMain.java

@@ -3,7 +3,6 @@
 import dataAccess.*;
 import flashcardRemover.fcRScreens.FcRFailureScreen;
 import flashcardRemover.fcRScreens.FcRSuccessScreen;
-import quizUseCase.screens.Screen;
 
 import java.io.IOException;