Currently cfg.ini supports a "gEnableCloseLoop" configuration item,
and this is used to override the WNI_CFG_ENABLE_CLOSE_LOOP entry in
the MAC CFG database. However this MAC CFG database entry is no
longer in use, so remove the obsolete support for this configuration
item.
Change-Id: Ic8b7f4f522e910476273dd428bbb471a19cbe79f
CRs-Fixed: 1060579