Remove global bpf include path system/bpf/progs/include

Delete it because there is only one user left
(system/bpfprogs/time_in_state.c). It can be specified locally.

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1930904

Bug: 202086915
Test: build and boot
Change-Id: I1cb0ceb7b8e3fb63af34e11e5fece11fa038b24e
Merged-In: I1cb0ceb7b8e3fb63af34e11e5fece11fa038b24e