feat: remove non-core env vars

Author: mychidarko

.env.example

@@ -5,6 +5,7 @@ APP_DOWN=false
 APP_DEBUG=true
 APP_PORT=5500
 APP_URL=http://localhost:5500/
+APP_PROD_REGION=lhr
 
 DB_CONNECTION=mysql
 DB_HOST=127.0.0.1
@@ -14,26 +15,3 @@ DB_USERNAME=LEAF_DB_USERNAME
 DB_PASSWORD=
 DB_CHARSET=utf8
 DB_COLLATION=utf8_unicode_ci
-# DB_COLLATION=utf8_general_ci
-
-MAIL_DRIVER=smtp
-MAIL_HOST=smtp.mailtrap.io
-MAIL_PORT=2525
-MAIL_DEBUG=SERVER
-MAIL_USERNAME=null
-MAIL_PASSWORD=null
-MAIL_ENCRYPTION=null
-
-PROD_SERVER=hello
-PROD_PORT=22
-PROD_USER=leaf
-
-SERVER_NAME=LEAF_SERVER
-SERVER_PORT=5500
-SERVER_USER=
-SERVER_PASSWORD=
-
-APPLICATION_DIR=leaf
-APPLICATION_PATH=leaf
-
-TOKEN_SECRET=