jvb: remove TCP support

It's not tested at all and has problems. The recommendation is to use a
TURN server for TCP.

docker-compose.yml

@@ -263,7 +263,6 @@ services:
         restart: ${RESTART_POLICY}
         ports:
             - '${JVB_PORT}:${JVB_PORT}/udp'
-            - '${JVB_TCP_PORT}:${JVB_TCP_PORT}'
         volumes:
             - ${CONFIG}/jvb:/config:Z
         environment:
@@ -275,9 +274,6 @@ services:
             - JVB_BREWERY_MUC
             - JVB_PORT
             - JVB_MUC_NICKNAME
-            - JVB_TCP_HARVESTER_DISABLED
-            - JVB_TCP_PORT
-            - JVB_TCP_MAPPED_PORT
             - JVB_STUN_SERVERS
             - JVB_OCTO_BIND_ADDRESS
             - JVB_OCTO_PUBLIC_ADDRESS