fixup release note (track_and_verify_wals_in_manifest not available in 6.14)

Author: ajkr

HISTORY.md

@@ -1,7 +1,7 @@
 # Rocksdb Change Log
 ## 6.14.6 (12/01/2020)
 ### Bug Fixes
-* Truncated WALs ending in incomplete records can no longer produce gaps in the recovered data when `WALRecoveryMode::kPointInTimeRecovery` is used. Gaps are still possible when WALs are truncated exactly on record boundaries; for complete protection, users should enable `track_and_verify_wals_in_manifest`.
+* Truncated WALs ending in incomplete records can no longer produce gaps in the recovered data when `WALRecoveryMode::kPointInTimeRecovery` is used. Gaps are still possible when WALs are truncated exactly on record boundaries.
 
 ## 6.14.5 (11/15/2020)
 ### Bug Fixes