Remove alcaeus/mongo-php-adapter committed by accident

Author: dkarlovi

composer.json

@@ -17,7 +17,6 @@
     ],
     "require": {
         "php": "^7.1",
-        "alcaeus/mongo-php-adapter": "^1.1",
         "friendsofsymfony/oauth2-php": "~1.1",
         "symfony/dependency-injection": "~3.0|~4.0",
         "symfony/framework-bundle": "~3.0|~4.0",