drm/amd/display: Remove periodic detection callbacks from dcn35+

drm/amd/display: Remove periodic detection callbacks from dcn35+

[WHY&HOW]
These will not be needed going forward as DMU will communicate to the
driver when detection may be needed after a power saving event.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>