Bluetooth: GAP: Revert "Bluetooth: Fix for device gets stuck in pairing"

This reverts commit f4c10bb6.

- Reverted the change since L settings app design is taking care
  of simultaneous pairing or pair to two devices one after the other.

CRs-Fixed: 820146
Change-Id: I76b897b1ba5ff13428cbdc2d785a29d4d6342426