Revert "Bluetooth: hci_core: Cancel request on command timeout"

This reverts commit 1b6cfa4c which is
commit 63298d6e upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I63e22487a918e73d667b231128efcfceb48f528b
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>