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

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



Change-Id: Id94b59e19e0848e129bfdde0b24894e0875ae800
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>