Revert recent changes to env file.

.env.example

-APP_ENV="local"
+APP_ENV=local
 APP_KEY=
 APP_DEBUG=true
-APP_LOG_LEVEL="debug"
-APP_URL="http://localhost"
+APP_LOG_LEVEL=debug
+APP_URL=http://localhost
 
-DB_CONNECTION="mysql"
-DB_HOST="127.0.0.1"
+DB_CONNECTION=mysql
+DB_HOST=127.0.0.1
 DB_PORT=3306
-DB_DATABASE="homestead"
-DB_USERNAME="homestead"
-DB_PASSWORD="secret"
+DB_DATABASE=homestead
+DB_USERNAME=homestead
+DB_PASSWORD=secret
 
-CACHE_DRIVER="file"
-SESSION_DRIVER="file"
-QUEUE_DRIVER="sync"
+CACHE_DRIVER=file
+SESSION_DRIVER=file
+QUEUE_DRIVER=sync
 
-REDIS_HOST="127.0.0.1"
+REDIS_HOST=127.0.0.1
 REDIS_PASSWORD=null
 REDIS_PORT=6379
 
-MAIL_DRIVER="smtp"
-MAIL_HOST="mailtrap.io"
+MAIL_DRIVER=smtp
+MAIL_HOST=mailtrap.io
 MAIL_PORT=2525
 MAIL_USERNAME=null
 MAIL_PASSWORD=null