Remove global pin for ldappool

Since upstream is now fixed.
https://review.openstack.org/#/c/468420/

Change-Id: I2c522f53b3901fc6e13014ef2cba5b1acb36d341

global-requirement-pins.txt

@@ -5,13 +5,6 @@
 #
 # Use this file with caution!
 #
-
-# Due to https://bugs.launchpad.net/openstack-ansible/+bug/1693793,
-# ldappool must be pinned to == 2.1.0.
-# https://review.openstack.org/#/c/468420/
-# TODO: mgariepy, remove this once upstream is fixed.
-ldappool==2.1.0
-
 ###
 ### These are pinned to ensure exactly the same behaviour forever!   ###
 ### These pins are updated through the sources-branch-updater script ###

releasenotes/notes/ldappool-65dcc48c12d28d07.yaml

@@ -1,5 +1,3 @@
 ---
 fixes:
-  - The version 2.1.0 of ldappool fix the issue with TLS bind on ldapserver.
-    It is set in global pin to fix the issue in OSA until the fix is made
-    upstream.
+  - Upstream is now depending on version 2.1.0 of ldappool.