KAFKA-18485; Update log4j2.yaml (#18504)

We can remove the old controller logger in 4.0.

Reviewers: Chia-Ping Tsai <chia7712@gmail.com>

config/log4j2.yaml

@@ -126,18 +126,12 @@ Configuration:
         additivity: false
         AppenderRef:
           ref: RequestAppender
-      # KRaft mode controller logger
+      # Controller logger
       - name: org.apache.kafka.controller
         level: INFO
         additivity: false
         AppenderRef:
           ref: ControllerAppender
-      # ZK mode controller logger
-      - name: kafka.controller
-        level: TRACE
-        additivity: false
-        AppenderRef:
-          ref: ControllerAppender
       # LogCleaner logger
       - name: kafka.log.LogCleaner
         level: INFO