Merge branch 'tools: bpftool: Remove unused struct'

Yuan Can says:

====================
This series contains two cleanup patches, remove unused struct.
====================

Signed-off-by: Andrii Nakryiko <[e-mail]>

tools/bpf/bpftool/btf.c

···
 	[BTF_KIND_ENUM64]	= "ENUM64",
 };
 
-struct btf_attach_point {
-	__u32 obj_id;
-	__u32 btf_id;
-};
-
 static const char *btf_int_enc_str(__u8 encoding)
 {
 	switch (encoding) {

tools/bpf/bpftool/map_perf_ring.c

···
 
 static volatile bool stop;
 
-struct event_ring_info {
-	int fd;
-	int key;
-	unsigned int cpu;
-	void *mem;
-};
-
 struct perf_event_sample {
 	struct perf_event_header header;
 	__u64 time;