libbpf: Remove BPF_EMBED_OBJ macro from libbpf.h

Drop BPF_EMBED_OBJ and struct bpf_embed_data now that skeleton automatically
embeds contents of its source object file. While BPF_EMBED_OBJ is useful
independently of skeleton, we are currently don't have any use cases utilizing
it, so let's remove them until/if we need it.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20191218052552.2915188-3-andriin@fb.com

tools/lib/bpf/libbpf.h

@@ -600,41 +600,6 @@ bpf_program__bpil_offs_to_addr(struct bpf_prog_info_linear *info_linear);
  */
 LIBBPF_API int libbpf_num_possible_cpus(void);
 
-struct bpf_embed_data {
-	void *data;
-	size_t size;
-};
-
-#define BPF_EMBED_OBJ_DECLARE(NAME)					\
-extern struct bpf_embed_data NAME##_embed;				\
-extern char NAME##_data[];						\
-extern char NAME##_data_end[];
-
-#define __BPF_EMBED_OBJ(NAME, PATH, SZ, ASM_TYPE)			\
-asm (									\
-"	.pushsection \".rodata\", \"a\", @progbits		\n"	\
-"	.global "#NAME"_data					\n"	\
-#NAME"_data:							\n"	\
-"	.incbin \"" PATH "\"					\n"	\
-"	.global "#NAME"_data_end				\n"	\
-#NAME"_data_end:						\n"	\
-"	.global "#NAME"_embed					\n"	\
-"	.type "#NAME"_embed, @object				\n"	\
-"	.size "#NAME"_size, "#SZ"				\n"	\
-"	.align 8,						\n"	\
-#NAME"_embed:							\n"	\
-"	"ASM_TYPE" "#NAME"_data					\n"	\
-"	"ASM_TYPE" "#NAME"_data_end - "#NAME"_data 		\n"	\
-"	.popsection						\n"	\
-);									\
-BPF_EMBED_OBJ_DECLARE(NAME)
-
-#if __SIZEOF_POINTER__ == 4
-#define BPF_EMBED_OBJ(NAME, PATH) __BPF_EMBED_OBJ(NAME, PATH, 8, ".long")
-#else
-#define BPF_EMBED_OBJ(NAME, PATH) __BPF_EMBED_OBJ(NAME, PATH, 16, ".quad")
-#endif
-
 struct bpf_map_skeleton {
 	const char *name;
 	struct bpf_map **map;