Remove unused main::shim::link_policy code am: 729a6afb am: 7483a6ff am:...

Remove unused main::shim::link_policy code am: 729a6afb am: 7483a6ff am: b2b55d54 am: 1222c21f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2129637



Change-Id: Idd0c38402310ada79d86a0d050213b212ef16bc4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>