GH-2859 remove twitch page and modpack import from URL

The functionality was broken, beyond repair and an ongoing maintenance
nightmare.

application/main.cpp

@@ -43,7 +43,6 @@ int main(int argc, char *argv[])
     {
         Q_INIT_RESOURCE(multimc);
         Q_INIT_RESOURCE(backgrounds);
-        Q_INIT_RESOURCE(assets);
 
         Q_INIT_RESOURCE(pe_dark);
         Q_INIT_RESOURCE(pe_light);