Fix doc

Author: Vincz

docs/annotations/annotations-reference.md

@@ -599,8 +599,6 @@ Optional attributes:
 If the `resolveType` attribute is not set, the service `overblog_graphql.interface_type_resolver` will be used to try to resolve the type automatically based on types implementing the interface and their associated class.  
 The system will register a map of interfaces with the list of types and their associated class name implementing the interface (the parameter is named `overblog_graphql_types.interfaces_map` in the container) and use it to resolve the type from the value (the first type where the class `instanceof` operator returns true will be used).  
 
-```php
-
 ## @Scalar
 
 This annotation is used on a _class_ to define a custom scalar.