Remove unused method removeAllQosPoliciesForScs am: dae46c94fa am: 5116522b5a

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/wpa_supplicant_8/+/21938779

Change-Id: I9a5af8ea7d7801353cb45a28f86ad111ec5e641c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>