fix(fonts): call the font manager's forget methods without a None-able local

Pylint E1102 (Codacy) read getattr(..., None) as possibly not callable.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/plugin_system/plugin_manager.py

@@ -606,11 +606,10 @@ class PluginManager:
         if self.font_manager is None:
             return
         for name in ('forget_manager_fonts', 'forget_plugin_fonts'):
-            forget = getattr(self.font_manager, name, None)
-            if forget is None:
+            if not hasattr(self.font_manager, name):
                 continue
             try:
-                forget(plugin_id)
+                getattr(self.font_manager, name)(plugin_id)
             except Exception as e:
                 self.logger.debug("Could not forget fonts of %s (%s): %s", plugin_id, name, e)