Drop explicit conflict with stable symfony/yaml

As per discussion in #6639, conflict with versions below 3.4 of the YAML component are superfluous, previous versions would work just fine even with bb994b9.
doctrine · Aug 30, 2017 · bd8f243 · bd8f243
1 parent 8c7052c
commit bd8f243
Showing 1 changed file with 0 additions and 3 deletions.
diff --git a/composer.json b/composer.json
@@ -24,9 +24,6 @@
         "doctrine/annotations": "~1.4",
         "symfony/console": "~3.0|~4.0"
     },
-    "conflict": {
-        "symfony/yaml": "<3.4"
-    },
     "require-dev": {
         "symfony/yaml": "~3.4|~4.0",
         "phpunit/phpunit": "^6.0"