removed wrong dep

Author: fabpot

src/Symfony/Bundle/SecurityBundle/composer.json

@@ -17,7 +17,6 @@
     ],
     "require": {
         "php": ">=5.3.9",
-        "symfony/event-dispatcher": "~2.8|~3.0.0",
         "symfony/security": "~2.8|~3.0.0",
         "symfony/security-acl": "~2.7|~3.0.0",
         "symfony/http-kernel": "~2.2|~3.0.0"