QmlDesigner: Remove unused curve editor icon pngs

eye, lock, unlock, pin and unpin are now provided via font icons.

Amends: 8ca3b557da

Change-Id: I435594d3be46ce64dd0c6b178767c899d76c3233
Reviewed-by: Knud Dollereder <knud.dollereder@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/curveeditor/curveeditor.qrc

@@ -6,15 +6,5 @@
         <file>images/tangetToolsLinearIcon@2x.png</file>
         <file>images/tangetToolsStepIcon.png</file>
         <file>images/tangetToolsStepIcon@2x.png</file>
-        <file>images/treeview_eye.png</file>
-        <file>images/treeview_eye@2x.png</file>
-        <file>images/treeview_pin.png</file>
-        <file>images/treeview_pin@2x.png</file>
-        <file>images/treeview_unpin.png</file>
-        <file>images/treeview_unpin@2x.png</file>
-        <file>images/treeview_lock.png</file>
-        <file>images/treeview_lock@2x.png</file>
-        <file>images/treeview_unlock.png</file>
-        <file>images/treeview_unlock@2x.png</file>
     </qresource>
 </RCC>