removed bbb-demo

it is not working right now, needs some rework

mod/demo/Dockerfile

@@ -1,16 +0,0 @@
-FROM tomcat:7-jdk8-openjdk
-
-ENV DOCKERIZE_VERSION v0.6.1
-
-RUN apt-get update &&  apt-get install -y wget binutils
-
-# download & install bbb-demo package manually
-RUN PACKAGE_PATH=$(curl -s https://ubuntu.bigbluebutton.org/xenial-220/dists/bigbluebutton-xenial/main/binary-amd64/Packages | grep -E 'Filename.*bbb-demo' | awk '{print $2}') \
-    && wget https://ubuntu.bigbluebutton.org/xenial-220/$PACKAGE_PATH \
-    && ar x bbb-demo_*.deb \
-    && tar x -f data.tar.gz ./var/tmp/demo.war \
-    && unzip ./var/tmp/demo.war -d /usr/local/tomcat/webapps/demo
-
-COPY entrypoint.sh /entrypoint.sh
-
-ENTRYPOINT /entrypoint.sh

mod/demo/entrypoint.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-FILE=/usr/local/tomcat/webapps/demo/bbb_api_conf.jsp
-echo -n "<%" > $FILE
-			echo "!
-// This is the security salt that must match the value set in the BigBlueButton server
-String salt = \"$SHARED_SECRET\";
-
-// This is the URL for the BigBlueButton server
-String BigBlueButtonURL = \"https://$DOMAIN/bigbluebutton/\";
-%>
-" >> $FILE
-
-/usr/local/tomcat/bin/catalina.sh run