Don't pass --app to Chrome
Don't pass --app to Chrome

It's not necessary as we pass --app-id, and --app overrides
WM_CLASS, which prevents GNOME Shell from matching the app
to the right .desktop file.

This follows Chrome's .desktop files which pass --app-id but
not --app.

rodrmoya/desktop-webapp-browser-extension,rodrmoya/desktop-webapp-browser-extension,rodrmoya/desktop-webapp-browser-extension,rodrmoya/desktop-webapp-browser-extension