Remove unused codec - libmad

libmad is no longer being used by any pkg in RHEL,
also no longer maintained.

Removing lame duplicate - included twice by mistake.

Author: Jiri-Koten

configs/rhel-sst-display-hardware-multimedia--codecs.yaml

@@ -7,8 +7,6 @@ data:
   packages:
     - libtheora
     - sbc
-    - lame
-    - libmad
     - mpg123
     - lame
     - a52dec