drm/amd/pm: fix memleak issue in smu_v15_0_8_get_gpu_metrics()

remove unsued code to avoid memleak issue.
(NOTE: This bug occurs during internal branch switching)

Fixes: 0a66ca3 ("drm/amd/pm: add get_gpu_metrics support for 15.0.8")
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Yang Wang

drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c

@@ -1611,8 +1611,6 @@ static ssize_t smu_v15_0_8_get_gpu_metrics(struct smu_context *smu, void **table
 	uint32_t mid_mask = adev->aid_mask;
 	MetricsTable_t *metrics;
 
-	metrics = kzalloc(sizeof(MetricsTable_t), GFP_KERNEL);
-
 	ret = smu_v15_0_8_get_metrics_table_internal(smu, 1, NULL);
 	if (ret)
 		return ret;