perf tools: Remove warning()

Now everything uses pr_warning(), so ditch it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.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-hv8r0mgdhk73wtfq3zrhavgx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/parse-events.c

@@ -1810,17 +1810,6 @@ static int test_pmu_events(void)
 	return ret;
 }
 
-static void debug_warn(const char *warn, va_list params)
-{
-	char msg[1024];
-
-	if (verbose <= 0)
-		return;
-
-	vsnprintf(msg, sizeof(msg), warn, params);
-	fprintf(stderr, " Warning: %s\n", msg);
-}
-
 int test__parse_events(int subtest __maybe_unused)
 {
 	int ret1, ret2 = 0;
@@ -1832,8 +1821,6 @@ do {							\
 		ret2 = ret1;				\
 } while (0)
 
-	set_warning_routine(debug_warn);
-
 	TEST_EVENTS(test__events);
 
 	if (test_pmu())

tools/perf/util/usage.c

@@ -33,21 +33,10 @@ static void error_builtin(const char *err, va_list params)
 	report(" Error: ", err, params);
 }
 
-static void warn_builtin(const char *warn, va_list params)
-{
-	report(" Warning: ", warn, 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 (*error_routine)(const char *err, va_list params) = error_builtin;
-static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
-
-void set_warning_routine(void (*routine)(const char *err, va_list params))
-{
-	warn_routine = routine;
-}
 
 void usage(const char *err)
 {
@@ -72,12 +61,3 @@ int error(const char *err, ...)
 	va_end(params);
 	return -1;
 }
-
-void warning(const char *warn, ...)
-{
-	va_list params;
-
-	va_start(params, warn);
-	warn_routine(warn, params);
-	va_end(params);
-}

tools/perf/util/util.h

@@ -17,9 +17,6 @@
 void usage(const char *err) __noreturn;
 void die(const char *err, ...) __noreturn __printf(1, 2);
 int error(const char *err, ...) __printf(1, 2);
-void warning(const char *err, ...) __printf(1, 2);
-
-void set_warning_routine(void (*routine)(const char *err, va_list params));
 
 static inline void *zalloc(size_t size)
 {