drm/amd/display: Remove unused struct freesync_context

All references to struct freesync_context were removed, so remove the
struct freesync_context itself and its entry on struct dc_stream_state.
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_stream.h

@@ -48,11 +48,6 @@ struct dc_stream_status {
 	bool is_abm_supported;
 };
 
-// TODO: References to this needs to be removed..
-struct freesync_context {
-	bool dummy;
-};
-
 enum hubp_dmdata_mode {
 	DMDATA_SW_MODE,
 	DMDATA_HW_MODE
@@ -184,9 +179,6 @@ struct dc_stream_state {
 	struct rect src; /* composition area */
 	struct rect dst; /* stream addressable area */
 
-	// TODO: References to this needs to be removed..
-	struct freesync_context freesync_ctx;
-
 	struct audio_info audio_info;
 
 	struct dc_info_packet hdr_static_metadata;