grass.desktop: key 'Encoding' in group 'Desktop Entry' is deprecated

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57943 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/icons/grass.desktop

@@ -1,6 +1,5 @@
 [Desktop Entry]
 Type=Application
-Encoding=UTF-8
 Name=GRASS GIS
 Comment=Geographic Information System
 Comment[cs]=Geografický Informační Systém