selftests: ALSA: remove unused variables

These variables are never referenced in the code, just remove them.

Signed-off-by: Ding Xiang <[e-mail]>
Reviewed-by: Mark Brown <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

tools/testing/selftests/alsa/conf.c

···
 int conf_get_bool(snd_config_t *root, const char *key1, const char *key2, int def)
 {
 	snd_config_t *cfg;
-	long l;
 	int ret;
 
 	if (!root)

tools/testing/selftests/alsa/mixer-test.c

···
 {
 	unsigned short revents;
 	snd_ctl_event_t *event;
-	int count, err;
+	int err;
 	unsigned int mask = 0;
 	unsigned int ev_id;
 
···
 static void test_ctl_name(struct ctl_data *ctl)
 {
 	bool name_ok = true;
-	bool check;
 
 	ksft_print_msg("%d.%d %s\n", ctl->card->card, ctl->elem,
 		       ctl->name);
···
 					 snd_ctl_elem_value_t *val)
 {
 	int err;
-	long val_read;
 
 	/* Ideally this will fail... */
 	err = snd_ctl_elem_write(ctl->card->handle, val);
···
 
 static bool test_ctl_write_invalid_boolean(struct ctl_data *ctl)
 {
-	int err, i;
-	long val_read;
+	int i;
 	bool fail = false;
 	snd_ctl_elem_value_t *val;
 	snd_ctl_elem_value_alloca(&val);
···
 
 static bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl)
 {
-	int err, i;
-	unsigned int val_read;
+	int i;
 	bool fail = false;
 	snd_ctl_elem_value_t *val;
 	snd_ctl_elem_value_alloca(&val);
···
 static void test_ctl_write_invalid(struct ctl_data *ctl)
 {
 	bool pass;
-	int err;
 
 	/* If the control is turned off let's be polite */
 	if (snd_ctl_elem_info_is_inactive(ctl->info)) {

tools/testing/selftests/alsa/pcm-test.c

···
 static void test_pcm_time(struct pcm_data *data, enum test_class class,
 			  const char *test_name, snd_config_t *pcm_cfg)
 {
-	char name[64], key[128], msg[256];
+	char name[64], msg[256];
 	const int duration_s = 2, margin_ms = 100;
 	const int duration_ms = duration_s * 1000;
 	const char *cs;
···
 {
 	struct card_data *card;
 	struct pcm_data *pcm;
-	snd_config_t *global_config, *cfg, *pcm_cfg;
+	snd_config_t *global_config, *cfg;
 	int num_pcm_tests = 0, num_tests, num_std_pcm_tests;
 	int ret;
 	void *thread_ret;

tools/testing/selftests/alsa/test-pcmtest-driver.c

···
  */
 TEST_F(pcmtest, reset_ioctl) {
 	snd_pcm_t *handle;
-	unsigned char *it;
 	int test_res;
 	struct pcmtest_test_params *params = &self->params;