HDFS-9639. Fix up CHANGES.txt

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -1645,9 +1645,6 @@ Release 2.8.0 - UNRELEASED
     HDFS-9626. TestBlockReplacement#testBlockReplacement fails occasionally.
     (Xiao Chen via zhz)
 
-    HDFS-9493. Test o.a.h.hdfs.server.namenode.TestMetaSave fails in trunk.
-    (Tony Wu via lei)
-
     HDFS-9639. Inconsistent Logging in BootstrapStandby. (Xiaobing Zhou via
     Arpit Agarwal)