Remove superfluous wp files

Fixes #35

Dockerfile

@@ -9,6 +9,7 @@ RUN apt-get update && \
 RUN mkdir -p /app/code
 WORKDIR /app/code
 RUN curl -L http://wordpress.org/wordpress-4.9.5.tar.gz | tar -xz --strip-components 1 -f -
+RUN rm readme.html wp-admin/install.php wp-config-sample.php
 RUN mv /app/code/wp-content /app/code/wp-content-vanilla && ln -s /app/data/wp-content /app/code/wp-content
 RUN ln -s /app/data/htaccess /app/code/.htaccess
 ADD wp-config.php.template /app/code/wp-config.php.template
@@ -19,7 +20,6 @@ RUN curl -L -o /app/code/wp https://github.com/wp-cli/wp-cli/releases/download/v
 RUN chmod +x /app/code/wp
 RUN /bin/echo -e "apache_modules:\n  - mod_rewrite" > /app/code/wp-cli.yml
 
-
 # Get the plugins
 RUN curl -L -o /app/code/authLdap.zip https://github.com/heiglandreas/authLdap/archive/1.5.1.zip
 # https://plugins.svn.wordpress.org/disable-wordpress-core-update/