Remove No Longer Relevant Release Note

The release note for draining the session pool was
superceded by another change and no longer relevant

Signed-off-by: Brett Logan <brett.t.logan@ibm.com>

release_notes/v1.4.9.md

@@ -34,13 +34,6 @@ with a new certificate that has the same public key, without requiring channel c
 
 The enrollment, TLS server, and TLS client certificate expiration dates are now logged upon peer and orderer startup.
 
-**peer and orderer PKCS#11 - Drain session pool before creating new sessions**
-
-If an invalid PKCS#11 session was acquired from the session pool,
-a new session would be immediately created instead of attempting to acquire another
-session from the pool.
-This change attempts to uses pooled sessions before creating new ones.
-
 **peer and orderer PKCS#11 - Add object handle cache**
 
 With this change, object handles are cached in the PKCS#11 implementation.