net/sems: Remove librtmp support

Legacy library that's superseded by FFmpeg
Planned deprecation via PR 277418

PR:		277815
Approved by:	portmgr (maintainer timeout, 2+ weeks)

net/sems/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	sems
 DISTVERSION=	${SEMS_VERSION}.g20200510
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	net
 
 MAINTAINER=	nwhitehorn@FreeBSD.org
@@ -13,7 +13,6 @@ LICENSE_FILE=	${WRKSRC}/doc/COPYING
 LIB_DEPENDS=	libopus.so:audio/opus \
 		libcodec2.so:audio/codec2 \
 		libevent.so:devel/libevent \
-		librtmp.so:multimedia/librtmp \
 		libilbc.so:net/ilbc \
 		libgsm.so:audio/gsm \
 		libsamplerate.so:audio/libsamplerate \
@@ -34,7 +33,7 @@ CFLAGS+=	-Wno-reorder
 CMAKE_ARGS=	-DSEMS_CFG_PREFIX=${PREFIX} -DSEMS_AUDIO_PREFIX=${PREFIX}/lib \
 		-DSEMS_EXEC_PREFIX=${PREFIX} -DSEMS_DOC_PREFIX=${PREFIX}/share/doc
 CMAKE_ON=	SEMS_USE_SPANDSP SEMS_USE_LIBSAMPLERATE SEMS_USE_OPUS \
-		SEMS_USE_OPENSSL
+		SEMS_USE_OPENSSL CMAKE_DISABLE_FIND_PACKAGE_Librtmp
 
 USE_RC_SUBR=	sems
 

net/sems/pkg-plist

@@ -27,7 +27,6 @@
 @sample %%ETCDIR%%/etc/refuse.sbcprofile.conf.sample
 @sample %%ETCDIR%%/etc/reg_agent.conf.sample
 @sample %%ETCDIR%%/etc/replytranslate.sbcprofile.conf.sample
-@sample %%ETCDIR%%/etc/rtmp.conf.sample
 @sample %%ETCDIR%%/etc/sbc.conf.sample
 @sample %%ETCDIR%%/etc/src_ipmap.conf.sample
 @sample %%ETCDIR%%/etc/sst_b2b.sbcprofile.conf.sample
@@ -168,7 +167,6 @@ lib/sems/plug-in/opus.so
 lib/sems/plug-in/precoded_announce.so
 lib/sems/plug-in/reg_agent.so
 lib/sems/plug-in/registrar_client.so
-lib/sems/plug-in/rtmp.so
 lib/sems/plug-in/sbc.so
 lib/sems/plug-in/session_timer.so
 lib/sems/plug-in/speex.so