Remove MailHog variables from production environment file

This commit removes the MailHog-related environment variables from the
.env.prod file since MailHog is intended for development use only.

The email testing service is configured with the dev profile in
docker-compose.yml and should not be running in production environments.
This change ensures that production configurations remain clean and
focused only on essential services.

The development environment (.env.dev) still maintains these variables
for local email testing purposes.

Author: nanoninja

.env.prod

@@ -40,10 +40,3 @@ PHPMYADMIN_PROFILE=none
 APP_WORKSPACE=default
 APP_DIR=app
 APP_PUBLIC_DIR=$(APP_DIR)/public
-
-# MailHog configuration
-MAILHOG_SMTP_PORT=1025
-MAILHOG_UI_PORT=8025
-MAILHOG_STORAGE=memory
-MAILHOG_HOSTNAME=mailhog
-MAILHOG_CORS_ORIGIN=*