Removes deprecated and useless items.

--- a/knutclient.desktop
+++ b/knutclient.desktop
@@ -6,9 +6,8 @@
 Comment[de]=
 Comment[cs]=Klient pro UPS syst� NUT
 Comment[es]=Cliente KDE para NUT
-Exec=knutclient -caption "%c" %i %m
+Exec=knutclient
 Icon=knutclient
-MiniIcon=knutclient
 Type=Application
 X-DocPath=knutclient/index.html
 GenericName=KNutClient