xorg: use basic dwm start

.xinitrc

@@ -11,15 +11,5 @@ setbg
 
 csum=""
 new_csum=$(sha1sum $(which dwm))
-while true
-do
-    if [ "$csum" != "$new_csum" ]
-    then
-        csum=$new_csum
-        dwm
-    else
-        exit 0
-    fi
-    new_csum=$(sha1sum $(which dwm))
-    sleep 0.5
-done
+
+exec dwm