perf comm: Remove needless headers from comm.h

There we don't need rbtree, only in comm.c, also ditch perf.h, not
needed at all.

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-vr1jnwwujh99skrgldtimpmu@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/comm.c

@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <linux/refcount.h>
+#include <linux/rbtree.h>
 #include "rwsem.h"
 
 struct comm_str {

tools/perf/util/comm.h

@@ -2,9 +2,9 @@
 #ifndef __PERF_COMM_H
 #define __PERF_COMM_H
 
-#include "../perf.h"
-#include <linux/rbtree.h>
 #include <linux/list.h>
+#include <linux/types.h>
+#include <stdbool.h>
 
 struct comm_str;