vmwareapi: remove some unused fake vim methods

Rename_Task unused since I92acdd5cd00f739d504738413d3b63a2e17f2866

AcquireCloneTicket and PowerDownHostToStandBy_Task were never used.

Change-Id: I025d121db41ed1f6084364ff1a52eade1c3d6a90
Merge "vmwareapi: remove some unused fake vim methods"