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

bta::dm::disc Remove already included function declarations am: ff734e75 am: 48b68bb1 am: a1cff73d

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



Change-Id: I7d3a94e0b9e70faa87f037ecdb93c1a4956b6dbf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>