lockscreen: do not bind the shortcuts in lockscreen indicators

Otherwise we have screenlocker occupying the shortcut keys and they do
not work in the shell when we want to use regularly.

If screen is locked, the kglobalaccell will handle the volume keys
automatically by itself and we do not need to handle it in the
lockscreen.

look-and-feel/contents/lockscreen/indicators/Volume.qml

@@ -64,69 +64,6 @@ PlasmaCore.IconItem {
         return output && output.name === dummyOutputName;
     }
 
-    function boundVolume(volume) {
-        return Math.max(PulseAudio.MinimalVolume, Math.min(volume, maxVolumeValue));
-    }
-
-    function volumePercent(volume, max){
-        if(!max) {
-            max = PulseAudio.NormalVolume;
-        }
-        return Math.round(volume / max * 100.0);
-    }
-
-    function playFeedback(sinkIndex) {
-        if(!volumeFeedback){
-            return;
-        }
-        if(sinkIndex == undefined) {
-            sinkIndex = paSinkModel.preferredSink.index;
-        }
-        feedback.play(sinkIndex)
-    }
-
-    function increaseVolume() {
-        if (!paSinkModel.preferredSink || isDummyOutput(paSinkModel.preferredSink)) {
-            return;
-        }
-
-        var volume = boundVolume(paSinkModel.preferredSink.volume + volumeStep);
-        var percent = volumePercent(volume, maxVolumeValue);
-        paSinkModel.preferredSink.muted = percent == 0;
-        paSinkModel.preferredSink.volume = volume;
-        osd.show(percent);
-        playFeedback();
-
-    }
-
-    function decreaseVolume() {
-        if (!paSinkModel.preferredSink || isDummyOutput(paSinkModel.preferredSink)) {
-            return;
-        }
-
-        var volume = boundVolume(paSinkModel.preferredSink.volume - volumeStep);
-        var percent = volumePercent(volume, maxVolumeValue);
-        paSinkModel.preferredSink.muted = percent == 0;
-        paSinkModel.preferredSink.volume = volume;
-        osd.show(percent);
-        playFeedback();
-    }
-
-
-
-    function muteVolume() {
-        if (!paSinkModel.preferredSink || isDummyOutput(paSinkModel.preferredSink)) {
-            return;
-        }
-
-        var toMute = !paSinkModel.preferredSink.muted;
-        paSinkModel.preferredSink.muted = toMute;
-        osd.show(toMute ? 0 : volumePercent(paSinkModel.preferredSink.volume, maxVolumeValue));
-        if (!toMute) {
-            playFeedback();
-        }
-    }
-
     SinkModel {
         id: paSinkModel
     }
@@ -138,39 +75,4 @@ PlasmaCore.IconItem {
     VolumeFeedback {
         id: feedback
     }
-
-    GlobalActionCollection {
-        // KGlobalAccel cannot transition from kmix to something else, so if
-        // the user had a custom shortcut set for kmix those would get lost.
-        // To avoid this we hijack kmix name and actions. Entirely mental but
-        // best we can do to not cause annoyance for the user.
-        // The display name actually is updated to whatever registered last
-        // though, so as far as user visible strings go we should be fine.
-        // As of 2015-07-21:
-        //   componentName: kmix
-        //   actions: increase_volume, decrease_volume, mute
-        name: "kmix"
-        displayName: main.displayName
-
-        GlobalAction {
-            objectName: "increase_volume"
-            text: i18n("Increase Volume")
-            shortcut: Qt.Key_VolumeUp
-            onTriggered: increaseVolume()
-        }
-
-        GlobalAction {
-            objectName: "decrease_volume"
-            text: i18n("Decrease Volume")
-            shortcut: Qt.Key_VolumeDown
-            onTriggered: decreaseVolume()
-        }
-
-        GlobalAction {
-            objectName: "mute"
-            text: i18n("Mute")
-            shortcut: Qt.Key_VolumeMute
-            onTriggered: muteVolume()
-        }
-    }
 }