NetBpfLoad: remove support for 'size_of_bpf_map_def' am: acd4aa838c am: be3ac8143d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3221267

Change-Id: Iab65f59175aa4e14bc79fa9636a67ba153c1cea1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>