qcacld-3.0: Remove work create for peer_unmap_timer_handler

This is revert of Change-Id: I9a9554ef0aa9288bf5abe22cd2513d8cc41c29d4

When peer_unmap_timer_handler runs for multiple peers, same work
is INITed for multiple peers as this work is not per peer based.
This will update the work param i.e. peer gets updated each time,
which leads in deletion of wrong peer.

Remove the work INIT and scheduling of "peer_unmap_timer_work_function"
as cds_trigger_recover() has already taken care of atomic context.

Change-Id: Ida0a50f27cfe4c08763b359dab51c82e757ec100
CRs-Fixed: 2498498