ftp/curl: Remove support for librtmp

Remove invalid option as support for librtmp was removed in
8d01b54

Approved by:	portmgr (blanket)

ftp/curl/Makefile

@@ -44,7 +44,7 @@ OPTIONS_DEFINE=	ALTSVC BROTLI COOKIES CURL_DEBUG DEBUG DOCS EXAMPLES IDN IPV6 NT
 OPTIONS_GROUP=	PROTOCOL
 OPTIONS_RADIO=	SSL
 OPTIONS_SINGLE=	GSSAPI RESOLV
-OPTIONS_GROUP_PROTOCOL=	DICT FTP GOPHER HTTP HTTP2 IMAP LDAP LDAPS LIBSSH LIBSSH2 MQTT POP3 RTMP RTSP SMB SMTP TELNET TFTP WEBSOCKET
+OPTIONS_GROUP_PROTOCOL=	DICT FTP GOPHER HTTP HTTP2 IMAP LDAP LDAPS LIBSSH LIBSSH2 MQTT POP3 RTSP SMB SMTP TELNET TFTP WEBSOCKET
 OPTIONS_RADIO_SSL=	GNUTLS OPENSSL WOLFSSL
 OPTIONS_SINGLE_GSSAPI=	GSSAPI_BASE GSSAPI_HEIMDAL GSSAPI_MIT GSSAPI_NONE
 OPTIONS_SINGLE_RESOLV=	CARES THREADED_RESOLVER
@@ -133,9 +133,6 @@ POP3_CONFIGURE_ENABLE=	pop3
 PROXY_CONFIGURE_ENABLE=	proxy
 PSL_CONFIGURE_WITH=	libpsl
 PSL_LIB_DEPENDS=	libpsl.so:dns/libpsl
-RTMP_CONFIGURE_WITH=	librtmp
-RTMP_LIB_DEPENDS=	librtmp.so:multimedia/librtmp
-RTMP_USES=		pkgconfig
 RTSP_CONFIGURE_ENABLE=	rtsp
 SMB_CONFIGURE_ENABLE=	smb
 SMTP_CONFIGURE_ENABLE=	smtp