qcacld-3.0: Remove obsolete MAC Thread definitions

An ancestor of the current driver featured a multi-threaded MAC
implementation. Some definitions from that driver still exist,
including timer durations, service queue sizes, thread entry points,
thread stack sizes, and thread priorities. Since none of these are
used by the current driver, remove them.

Change-Id: I574aeeedcc8a67a4b763f7ef179753416ae1731e
CRs-Fixed: 2361051
1 file changed