cleanup: Remove unused eslint-disable directives

The 'camelcase' rule only applies to variables and properties,
not to function names are getter/setter.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/413>
(cherry picked from commit 9e11ec9940)

extensions/window-list/extension.js

@@ -432,12 +432,10 @@ class BaseButton extends DashItemContainer {
         return this._button.has_style_class_name('focused');
     }
 
-    // eslint-disable-next-line camelcase
     get ignore_workspace() {
         return this._ignoreWorkspace;
     }
 
-    // eslint-disable-next-line camelcase
     set ignore_workspace(ignore) {
         if (this._ignoreWorkspace === ignore)
             return;