Revert "drm/amd/display: Add fallback configuration when set DRR"

This reverts commit d76c0a23.

This change must be reverted since it caused soft hangs when changing
the refresh rate to 122 & 144Hz when using a 7000 series GPU.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reported-by: Mark Broadworth <Mark.Broadworth@amd.com>
Cc: Daniel Wheeler <daniel.wheeler@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>