drm/amd/display: Remove unnecessary assignemnt

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -41,7 +41,6 @@ static bool construct(struct dc_stream_state *stream,
 
 	stream->sink = dc_sink_data;
 	stream->ctx = stream->sink->ctx;
-	stream->sink = dc_sink_data;
 
 	dc_sink_retain(dc_sink_data);