Revert "HADOOP-18082.Add debug log when RPC#Reader gets a Call. (#3891). Contributed by JiangHua Zhu."

Exposes a Race Condition. Which leads to test failures in YARN. (HADOOP-18143)

This reverts commit 2025243fbf.

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java

@@ -3029,9 +3029,6 @@ public abstract class Server {
       } else {
         callQueue.add(call);
       }
-
-      LOG.debug("Call has entered the CallQueue and is waiting to be processed. " +
-          "Call details: {}", call);
       long deltaNanos = Time.monotonicNowNanos() - call.timestampNanos;
       call.getProcessingDetails().set(Timing.ENQUEUE, deltaNanos,
           TimeUnit.NANOSECONDS);