perf tools: Simplify die() mechanism

This should die altogether, but for now lets remove a bit of this stuff,
as it is not used at all.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ade3n99xscldhg5mx2vzd8p3@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/usage.c

@@ -41,15 +41,9 @@ static void warn_builtin(const char *warn, va_list params)
 /* If we are in a dlopen()ed .so write to a global variable would segfault
  * (ugh), so keep things static. */
 static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
-static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
 static void (*error_routine)(const char *err, va_list params) = error_builtin;
 static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
 
-void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
-{
-	die_routine = routine;
-}
-
 void set_warning_routine(void (*routine)(const char *err, va_list params))
 {
 	warn_routine = routine;
@@ -65,7 +59,7 @@ void die(const char *err, ...)
 	va_list params;
 
 	va_start(params, err);
-	die_routine(err, params);
+	die_builtin(err, params);
 	va_end(params);
 }
 

tools/perf/util/util.h

@@ -140,7 +140,6 @@ extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)))
 
 #include "../../../include/linux/stringify.h"
 
-extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 extern void set_warning_routine(void (*routine)(const char *err, va_list params));
 
 extern int prefixcmp(const char *str, const char *prefix);