refactor(src/utils): drop unused AppName methods and simplify DBusMenuClient

Removed get_app_exec, get_desktop_file, on_focus, get_revision; renamed parameter format_ to _format_; cleaned up imports and dead code.

src/utils/occlusion.py

@@ -1,17 +1,7 @@
 from services.modus import (
     check_occlusion as _check_occlusion,
-    get_screen_dimensions as _get_screen_dimensions,
-    get_active_workspace_id,
 )
 
 
-def get_current_workspace():
-    return get_active_workspace_id()
-
-
-def get_screen_dimensions():
-    return _get_screen_dimensions()
-
-
 def check_occlusion(occlusion_region, workspace=None):
     return _check_occlusion(occlusion_region, workspace)