Revert "Bluetooth: Initiate dedicated bonding if pin/key missing on remote device"

Change has to be reverted to address one user interaction case,
in the process of addressing one issue it made mandate to have
user interactions in some BT scenarios, the issue is fixed via
f8fffe8423933433c30dda4f9a92afc71e8def21 and it addressees all
the user scenarios properly.

More details on this issue is provided in CR: 413132 analysis
section in the prism.

This reverts commit 45df0f99.

Change-Id: I56611cb2646789c71f4012e906a7bbada1236c00
Signed-off-by: Bhasker Neti <bneti@codeaurora.org>
Signed-off-by: Mallikarjuna GB <gbmalli@codeaurora.org>