Drop translation bundle requirement hack, fix #54 (#77)

Author: RSalo

composer.json

@@ -12,8 +12,7 @@
     "require": {
         "php": "^7.2",
         "symfony-cmf/resource-bundle": "^1.0",
-        "jms/serializer-bundle": "^2.0 || ^3.0",
-        "symfony/translation": "^2.8 || ^3.3 || ^4.0"
+        "jms/serializer-bundle": "^2.0 || ^3.0"
     },
     "require-dev": {
         "symfony-cmf/testing": "^2.1@dev",
@@ -30,7 +29,6 @@
         "symfony/templating": "^2.8 || ^3.3 || ^4.0",
         "symfony/form": "^2.8 || ^3.3 || ^4.0",
         "symfony/web-server-bundle": "^2.8 || ^3.3 || ^4.0",
-        "symfony/translation": "^2.8 || ^3.3 || ^4.0",
         "phpspec/prophecy": "^1.12"
     },
     "suggest": {