That lone acquire() was hopefully just a needless copy/paste

...from ab9d657e0060473a25abd6f36bd30aad0574a4db "INTEGRATION: CWS dba22ui:
acquire in dtor, to prevent reentrance."  Yuck.

Change-Id: Iec5e1fa9d04199a4a1e83c67ed2014299317c5d8