misc: remove unneeded env variable

Set it directly in the compose file, since it depends on the XMPP
server's hostname.

README.md

@@ -105,7 +105,6 @@ Variable | Description | Default value
 --- | --- | ---
 `XMPP_DOMAIN` | Internal XMPP domain | meet.jitsi
 `XMPP_AUTH_DOMAIN` | Internal XMPP domain for authenticated services | auth.meet.jitsi
-`XMPP_BOSH_URL_BASE` | Base URL for XMPP BOSH connections | http://xmpp.meet.jitsi:5280
 `XMPP_MUC_DOMAIN` | XMPP domain for the MUC | muc.meet.jitsi
 `XMPP_INTERNAL_MUC_DOMAIN` | XMPP domain for the internal MUC | internal-muc.meet.jitsi
 `JICOFO_COMPONENT_SECRET` | XMPP component password for Jicofo | s3cr37

docker-compose.yml

@@ -13,7 +13,7 @@ services:
             - JICOFO_AUTH_USER
             - XMPP_DOMAIN
             - XMPP_AUTH_DOMAIN
-            - XMPP_BOSH_URL_BASE
+            - XMPP_BOSH_URL_BASE=http://xmpp.meet.jitsi:5280
             - XMPP_MUC_DOMAIN
             - TZ
         networks:

env.example

@@ -43,9 +43,6 @@ XMPP_DOMAIN=meet.jitsi
 # Internal XMPP domain for authenticated services.
 XMPP_AUTH_DOMAIN=auth.meet.jitsi
 
-# XMPP BOSH URL base.
-XMPP_BOSH_URL_BASE=http://xmpp.meet.jitsi:5280
-
 # XMPP domain for the MUC.
 XMPP_MUC_DOMAIN=muc.meet.jitsi