perf tools: Remove duplicate headers

Remove duplicate headers which are included more than once in the same
file.
Signed-off-by: Brajeswar Ghosh <brajeswar.linux@gmail.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Colin King <colin.king@canonical.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Link: http://lkml.kernel.org/r/20190115135916.GA3629@hp-pavilion-15-notebook-pc-brajeswarSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -83,7 +83,6 @@
 #include <unistd.h>
 #include <sys/time.h>
 #include <sys/resource.h>
-#include <sys/wait.h>
 
 #include "sane_ctype.h"
 

tools/perf/tests/bp_account.c

@@ -15,7 +15,6 @@
 #include <sys/mman.h>
 #include <linux/compiler.h>
 #include <linux/hw_breakpoint.h>
-#include <sys/ioctl.h>
 
 #include "tests.h"
 #include "debug.h"

tools/perf/util/dso.h

@@ -8,7 +8,6 @@
 #include <sys/types.h>
 #include <stdbool.h>
 #include "rwsem.h"
-#include <linux/types.h>
 #include <linux/bitops.h>
 #include "map.h"
 #include "namespaces.h"

tools/perf/util/zlib.c

@@ -6,7 +6,6 @@
 #include <sys/mman.h>
 #include <zlib.h>
 #include <linux/compiler.h>
-#include <unistd.h>
 
 #include "util/compress.h"
 #include "util/util.h"