[nearby][clean up] Remove useless legacy code am: 64cbadfa am: 222b9b43

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2871217



Change-Id: I6b6215a860d34d9f9af93f04ae150e7578683e99
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>