net_test_stack_btm: Remove Wno-unused-parameter am: f71e0760

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3026543



Change-Id: I0a91a8bfd7f56dffd7a35591480bafeb59b12f44
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>