fix(dockerfile-linux): remove unneeded chmod command

Git tracks the executable bit correctly, and most (all?) build
environments' default umask is 0022.

Author: niheconomoum

8.1/alpine3.16/Dockerfile

@@ -118,7 +118,6 @@ RUN set -eux; \
 WORKDIR /etc/satosa
 
 COPY docker-entrypoint.sh /usr/local/bin/
-RUN chmod 0755 /usr/local/bin/docker-entrypoint.sh
 ENTRYPOINT ["docker-entrypoint.sh"]
 
 EXPOSE 8080