waybar: Fix keepawake module

Was displaying the wrong way round (no coffee on staying awake and coffe
on automatically going to sleep), and removed some useless variable
setting.

desktop/.config/waybar/config

@@ -8,8 +8,8 @@
         "format-alt": "{} {icon}",
         "format-alt-click": "click-right",
         "format-icons": {
-            "idle-disabled": "󰾫 ",
-            "idle-enabled": "󰅶 "
+            "idle-disabled": "󰅶 ",
+            "idle-enabled": "󰾫 "
         },
         "exec": "~/.config/waybar/modules/keepawake",
         "on-click": "~/.config/waybar/modules/keepawake toggle",