bpfloader: remove btf support am: b44e287ed0 am: 5216425124

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/2624709

Change-Id: Ic75b0e013e51f4ba94758e42276d8fc840a4bcf3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>