drm/amd/display: Remove unnecessary error message

[Why]
This error message is unnecessary because returning when aconnector is
uninitialized is the desired outcome during initialization. As well, there
is no equivalent error message for read_dpcd.
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

@@ -575,10 +575,8 @@ bool dm_helpers_dp_write_dpcd(
 {
 	struct amdgpu_dm_connector *aconnector = link->priv;
 
-	if (!aconnector) {
-		DRM_ERROR("Failed to find connector for link!");
+	if (!aconnector)
 		return false;
-	}
 
 	return drm_dp_dpcd_write(&aconnector->dm_dp_aux.aux,
 			address, (uint8_t *)data, size) > 0;