fix: remove unused field

Author: christolis

application/src/main/java/org/togetherjava/tjbot/features/code/CodeMessageHandler.java

@@ -52,7 +52,6 @@ public final class CodeMessageHandler extends MessageReceiverAdapter implements
 
     private final ComponentIdInteractor componentIdInteractor;
     private final Map<String, CodeAction> labelToCodeAction;
-    private final ChatGptService chatGptService;
 
     /**
      * Memorizes the ID of the bots code-reply message that a message belongs to. That way, the
@@ -75,7 +74,6 @@ public final class CodeMessageHandler extends MessageReceiverAdapter implements
     public CodeMessageHandler(FeatureBlacklist<String> blacklist, JShellEval jshellEval,
             ChatGptService chatGptService) {
         componentIdInteractor = new ComponentIdInteractor(getInteractionType(), getName());
-        this.chatGptService = chatGptService;
 
         List<CodeAction> codeActions =
                 Stream.of(new FormatCodeCommand(chatGptService), new EvalCodeCommand(jshellEval))