Remove unused main::shim::btm_api am: c2a5ed60 am: 599631e6 am: 6e2e44af...

Remove unused main::shim::btm_api am: c2a5ed60 am: 599631e6 am: 6e2e44af am: f58eebee am: 2b739926

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2576933



Change-Id: I372ec01a47f34df1ae6874f396749062956d7b79
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>