deprecate protocollib use

CommandWhitelistCommon/src/main/java/eu/endermite/commandwhitelist/common/ConfigCache.java

@@ -162,6 +162,11 @@ public class ConfigCache {
             groupList.put(key, loadCWGroup(key, groupSection));
         }
 
+        if (canDoProtocolLib) {
+            warn("Protocollib support is deprecated and will be removed in future versions. If you have an actual" +
+                    " use case for it (aka plugin does not work without it), please reach out via discord (https://discord.youhavetrouble.me).");
+        }
+
         return saveConfig();
     }