bpfloader: remove btf support am: b44e287ed0

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

Change-Id: I8b6e3d8c8afdd6482cfee99af1756d15bccce27a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>