Remove unused init-container.sh as permissions are now set in docker-compose.yml

Author: mbohal

docker/mkdocs/Dockerfile

@@ -1,6 +1,3 @@
 FROM            squidfunk/mkdocs-material:9
-
 RUN             mkdir /workspace
-
-COPY            ./init-container.sh /root/init-container.sh
 WORKDIR         /workspace