remove week from date

templates/lightdm-gtk-greeter.conf.j2

@@ -57,7 +57,7 @@ user-background=false
 xft-hintstyle=hintfull
 #xft-rgba=
 indicators=~session;~spacer;~host;~spacer;~clock;~spacer;~a11y;~power
-clock-format=%Y-%m-%d W%W %H:%M %Z
+clock-format=%Y-%m-%d %H:%M %Z
 keyboard=onboard
 #reader=
 #position=