Revert "rtsp-sdp: Parse width/height from caps and set SDP attribute"
Revert "rtsp-sdp: Parse width/height from caps and set SDP attribute"

This reverts commit 5fd034ff1a517db7f629ffcc3ed16839c61f5c97.

We already have a way to place extra attributes in the SDP by using a string
property with prefix x- or a- in the caps.

barisdemiray/gst-rtsp-server,thaytan/gst-rtsp-server,Lachann/gst-rtsp-server,barisdemiray/gst-rtsp-server,hsteinhaus/gst-rtsp-server,surround-io/gst-rtsp-server,Lachann/gst-rtsp-server,Lachann/gst-rtsp-server,thaytan/gst-rtsp-server,surround-io/gst-rtsp-server,barisdemiray/gst-rtsp-server,thaytan/gst-rtsp-server,hsteinhaus/gst-rtsp-server,hsteinhaus/gst-rtsp-server,surround-io/gst-rtsp-server