ui: cleanup some anti patterns

quickshell/Services/ChangelogService.qml

@@ -62,10 +62,6 @@ Singleton {
         }
     }
 
-    function showChangelog() {
-        changelogRequested();
-    }
-
     function dismissChangelog() {
         changelogDismissed = true;
         touchMarkerProcess.running = true;

quickshell/Services/IdleService.qml

@@ -64,10 +64,6 @@ Singleton {
     property bool monitorsOff: false
     property bool isShellLocked: false
 
-    function wake() {
-        requestMonitorOn();
-    }
-
     function reapplyDpmsIfNeeded() {
         if (monitorsOff)
             CompositorService.powerOffMonitors();