bta::dm::disc Remove already included function declarations am: ff734e75 am:...

bta::dm::disc Remove already included function declarations am: ff734e75 am: e5b23ad3 am: 911b391c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2853223



Change-Id: Ia8044e095e3d616c55a37846a3275cb2a72b2ab1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>