remove TestTrafficControllerSetUp & TestSocketFilterSetUp

This is (as yet) dead code copied over from //system/netd,
but not yet plumbed into any p/m/C Android.bp file/test.

Update the bpf_shared.h include to netd.h now that that has been
renamed, see:
  https://android-review.git.corp.google.com/c/platform/packages/modules/Connectivity/+/2335387

MTS test bpf_existence_test.cpp already does a better job
of testing for bpf program/map existence, see
  MAINLINE_FOR_T_PLUS
  MAINLINE_FOR_T_4_14_PLUS

Test: N/A, this file is not yet compiled
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I2ccfd86e352118f6f76e91ec20e10a9285414490
1 file changed