Remove deprecated code

MultiPlayerGameModeMixin.java missing in MIXIN (it was removed)
Remove method that is never used (Unused since 64c4f18 )

Author: Merennor

src/main/java/nekiplay/main/events/ClickWindowEvent.java

@@ -13,17 +13,4 @@ public static String GetVerbatim(String text) {
 
 		return new String(data, 0, idx);
 	}
-
-	public static String GetVerbatimAll(String text) {
-		int idx = 0;
-		var data = new char[text.length()];
-
-		for (int i = 0; i < text.length(); i++)
-			if (text.charAt(i) != '§' && text.charAt(i) != '&')
-				data[idx++] = text.charAt(i);
-			else
-				i++;
-
-		return new String(data, 0, idx);
-	}
 }