Add language to waybar; Remove useless config

waybar/.config/waybar/config

@@ -16,31 +16,19 @@
 		"cpu",
 		"battery",
 		"disk",
+        "sway/language",
 		"tray"
 	],
 
-	"custom/left-arrow-dark": {
-		"format": "",
-		"tooltip": false
-	},
-	"custom/left-arrow-light": {
-		"format": "",
-		"tooltip": false
-	},
-	"custom/right-arrow-dark": {
-		"format": "",
-		"tooltip": false
-	},
-	"custom/right-arrow-light": {
-		"format": "",
-		"tooltip": false
-	},
-
 	"sway/workspaces": {
 		"disable-scroll": true,
 		"format": "{name}"
 	},
 
+    "sway/language": {
+    	"format": "{short} {variant} ",
+    },
+
 	"clock#1": {
 		"format": "{:%a}",
 		"tooltip": false