Revert "add bpf_for_each_map_elem() helper definition"

This reverts commit 8711ae5494a3011f48543987fa08872d775df652.

Bug: 256991746
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I4835904f906422d5927feef82459ce1adcebc90c
diff --git a/staticlibs/native/bpf_headers/include/bpf/bpf_helpers.h b/staticlibs/native/bpf_headers/include/bpf/bpf_helpers.h
index 6eb8aa7..35d9f31 100644
--- a/staticlibs/native/bpf_headers/include/bpf/bpf_helpers.h
+++ b/staticlibs/native/bpf_headers/include/bpf/bpf_helpers.h
@@ -138,10 +138,6 @@
 static int (*bpf_map_delete_elem_unsafe)(const struct bpf_map_def* map,
                                          const void* key) = (void*)BPF_FUNC_map_delete_elem;
 
-static int (*bpf_for_each_map_elem)(const struct bpf_map_def* map, void *callback_fn,
-                                    void *callback_ctx, unsigned long long flags) = (void*)
-        BPF_FUNC_for_each_map_elem;
-
 #define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val)  \
         struct ____btf_map_##name {                     \
                 type_key key;                           \