Removed token line to fix AWS SDK error

Author: michaelaguiar

config/laravel-echo-api-gateway.php

@@ -5,7 +5,6 @@
     'connection' => [
         'key' => env('AWS_ACCESS_KEY_ID'),
         'secret' => env('AWS_SECRET_ACCESS_KEY'),
-        'token' => env('AWS_SESSION_TOKEN'),
         'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
     ],