remove qgis.xpm from images.qrc (followup 8b5f22e)

Author: jef-n

images/images.qrc

@@ -408,7 +408,6 @@
         <file>themes/default/propertyicons/symbology.png</file>
         <file>themes/default/propertyicons/system.svg</file>
         <file>themes/default/propertyicons/transparency.png</file>
-        <file>themes/default/qgis.xpm</file>
         <file>themes/default/rendererCategorizedSymbol.png</file>
         <file>themes/default/rendererGraduatedSymbol.png</file>
         <file>themes/default/rendererSingleSymbol.png</file>