remove duplicated env variables about database

docker/php/.env.example

@@ -4,13 +4,6 @@ APP_KEY=
 APP_DEBUG=true
 APP_URL=http://localhost:8000
 
-DB_CONNECTION=mysql
-DB_HOST=mariadb
-DB_PORT=3306
-DB_DATABASE=laravel
-DB_USERNAME=root
-DB_PASSWORD=root
-
 CORS_PATHS=api/*,sanctum/csrf-cookie,broadcasting/auth
 DEV_CORS_ALLOWED_ORIGINS=http://localhost:5173
 PROD_CORS_ALLOWED_ORIGINS=http://localhost
@@ -22,13 +15,6 @@ ADMIN_MAIL=
 ADMIN_PASSWORD=
 ADMIN_PHONE_NUMBER=
 
-
-
-
-
-
-
-
 APP_LOCALE=en
 APP_FALLBACK_LOCALE=en
 APP_FAKER_LOCALE=en_US
@@ -91,6 +77,5 @@ AWS_USE_PATH_STYLE_ENDPOINT=false
 
 VITE_APP_NAME="${APP_NAME}"
 
-
 TYPESENSE_CONNECTION=typesense
 TYPESENSE_API_KEY=