[REF] Odoo 11.0: simplify locale settings

locale settings does not need to re-genreate c.utf-8 as it's already
included in Debian Stretch. Also LANG is enough to define the locale
needed by Odoo. Finaly, apt-get does not really need to be explicitly
set in non interactive mode. apt-get is able to do the right thing.
Thanks @tianon

Author: d-fence

11.0/Dockerfile

@@ -2,13 +2,7 @@ FROM debian:stretch
 MAINTAINER Odoo S.A. <[email protected]>
 
 # Generate locale C.UTF-8 for postgres and general locale data
-ENV DEBIAN_FRONTEND noninteractive
-RUN apt-get update -qq && apt-get install -y locales -qq
-RUN echo 'C.UTF-8 UTF-8' >> /etc/locale.gen && locale-gen
-RUN dpkg-reconfigure locales && /usr/sbin/update-locale LANG=C.UTF-8
 ENV LANG C.UTF-8
-ENV LANGUAGE C.UTF-8
-ENV LC_ALL C.UTF-8
 
 # Install some deps, lessc and less-plugin-clean-css, and wkhtmltopdf
 RUN set -x; \