amd/display: remove unneeded variable: "pattern"

Remove unneeded variable: "pattern".
Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -126,9 +126,7 @@ static void dpcd_set_training_pattern(
 static enum dc_dp_training_pattern decide_cr_training_pattern(
 		const struct dc_link_settings *link_settings)
 {
-	enum dc_dp_training_pattern pattern = DP_TRAINING_PATTERN_SEQUENCE_1;
-
-	return pattern;
+	return DP_TRAINING_PATTERN_SEQUENCE_1;
 }
 
 static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *link,