qcacld-3.0: Remove gLimDeauthReasonCode from tAniSirLim
The gLimDeauthReasonCode field in tAniSirLim is initialized to 0 but
is otherwise never referenced. Since the field is ultimately unused,
remove it.
Change-Id: Ic3da451c4b3540ba72d45a1f03b0e89cc2ece725
CRs-Fixed: 2370783