remove no longer needed SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED macro

We can merge this now that:
  https://googleplex-android-review.git.corp.google.com/c/platform/system/netd/+/20284735
  'bpf_base_test - unconditionally run TestSocketFilterSetUp'
has been pulled into tm-mainline-prod.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I1b65cd41ce7b4eaab7f1fead2742c72e48294244
diff --git a/staticlibs/native/bpf_headers/include/bpf/BpfUtils.h b/staticlibs/native/bpf_headers/include/bpf/BpfUtils.h
index 65c542f..a6e4783 100644
--- a/staticlibs/native/bpf_headers/include/bpf/BpfUtils.h
+++ b/staticlibs/native/bpf_headers/include/bpf/BpfUtils.h
@@ -121,10 +121,5 @@
             GTEST_SKIP() << "Skip: bpf is not supported.";  \
     } while (0)
 
-// Only used by tm-mainline-prod's system/netd/tests/bpf_base_test.cpp
-// but platform and platform tests aren't expected to build/work in tm-mainline-prod
-// so we can just trivialize this
-#define SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED
-
 }  // namespace bpf
 }  // namespace android