kamailio-5.x: remove rtp_media_server package
menuconfig is currently showing warnings for kamailio:
WARNING: Makefile 'package/feeds/telephony/kamailio-5.x/Makefile' has a dependency on 'bcunit', which does not exist
WARNING: Makefile 'package/feeds/telephony/kamailio-5.x/Makefile' has a dependency on 'mediastreamer2', which does not exist
WARNING: Makefile 'package/feeds/telephony/kamailio-5.x/Makefile' has a dependency on 'ortp', which does not exist
This commit removes the module in question to clear the warnings.
Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>