perf cpumap: No need to include perf.h, ditch it

From a quick look this was never needed and just polluted the build,
needlessly making things including cpumap.h to be rebuild if perf.h or
anything it includes gets changed.

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-x10p8slllqkn3fc3bntjx3n0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/cpumap.h

@@ -7,8 +7,6 @@
 #include <internal/cpumap.h>
 #include <perf/cpumap.h>
 
-#include "perf.h"
-
 struct cpu_map_data;
 
 struct perf_cpu_map *perf_cpu_map__empty_new(int nr);