Removed dependency on .env file causing issue with Travis CL

.env

@@ -1,18 +0,0 @@
-#!/usr/bin/env bash
-
-# See https://docs.docker.com/compose/environment-variables/#the-env-file
-# Nginx
-NGINX_HOST=localhost
-
-# PHP
-# See https://hub.docker.com/r/nanoninja/php-fpm/tags/
-PHP_VERSION=7.2
-
-# MariaDB
-MARIADB_VERSION=10.3.8
-MYSQL_HOST=mysql
-MYSQL_DATABASE=test
-MYSQL_ROOT_USER=root
-MYSQL_ROOT_PASSWORD=root
-MYSQL_USER=dev
-MYSQL_PASSWORD=dev