perf cpumap: Remove needless includes from cpumap.h

The util/cpumap.h file doesn't use anything in refcount.h not in
debug.h, it needs just a forward reference to 'struct cpu_map_data',
that is defined in util/event.h and cpumap.h was getting indirectly via,
of all things, debug.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-mtjww98yptt4ppo6g2blavg5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/cpumap.h

@@ -4,12 +4,12 @@
 
 #include <stdio.h>
 #include <stdbool.h>
-#include <linux/refcount.h>
 #include <internal/cpumap.h>
 #include <perf/cpumap.h>
 
 #include "perf.h"
-#include "util/debug.h"
+
+struct cpu_map_data;
 
 struct perf_cpu_map *perf_cpu_map__empty_new(int nr);
 struct perf_cpu_map *cpu_map__new_data(struct cpu_map_data *data);