perf ctype: Remove unused 'graph_line' variable

Not being used at all anywhere.

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-1e567f8tn8m4ii7dy1w9dp39@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/ctype.c

@@ -31,10 +31,6 @@ unsigned char sane_ctype[256] = {
 	/* Nothing in the 128.. range */
 };
 
-const char *graph_line =
-	"_____________________________________________________________________"
-	"_____________________________________________________________________"
-	"_____________________________________________________________________";
 const char *graph_dotted_line =
 	"---------------------------------------------------------------------"
 	"---------------------------------------------------------------------"

tools/perf/util/sane_ctype.h

@@ -2,7 +2,6 @@
 #ifndef _PERF_SANE_CTYPE_H
 #define _PERF_SANE_CTYPE_H
 
-extern const char *graph_line;
 extern const char *graph_dotted_line;
 extern const char *spaces;
 extern const char *dots;