bpftool: Remove useless #include to <perf-sys.h> from map_perf_ring.c

The header is no longer needed since the event_pipe implementation
was updated to rely on libbpf's perf_buffer. This makes bpftool free of
dependencies to perf files, and we can update the Makefile accordingly.

Fixes: 9b190f18 ("tools/bpftool: switch map event_pipe to libbpf's perf_buffer")
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211020094826.16046-1-quentin@isovalent.com

tools/bpf/bpftool/Makefile

@@ -73,8 +73,7 @@ CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
 	-I$(LIBBPF_INCLUDE) \
 	-I$(srctree)/kernel/bpf/ \
 	-I$(srctree)/tools/include \
-	-I$(srctree)/tools/include/uapi \
-	-I$(srctree)/tools/perf
+	-I$(srctree)/tools/include/uapi
 CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
 ifneq ($(EXTRA_CFLAGS),)
 CFLAGS += $(EXTRA_CFLAGS)

tools/bpf/bpftool/map_perf_ring.c

@@ -22,7 +22,6 @@
 #include <sys/syscall.h>
 
 #include <bpf/bpf.h>
-#include <perf-sys.h>
 
 #include "main.h"