bpfloader: remove btf support am: b44e287ed0 am: 5216425124 am: 839276dcd8 am: 284b3c661d

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

Change-Id: I38bc14cec6c08a666dfe0ee456b68b03f6da55a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>