Simplify JSON:API collection schema properties

Author: Will-thom

src/JsonApi/JsonSchema/SchemaFactory.php

@@ -259,21 +259,15 @@ public function buildSchema(string $className, string $format = 'jsonapi', strin
         $properties = $this->buildDefinitionPropertiesSchema($key, $className, $format, $type, $operation, $schema, []);
         $properties['data']['properties']['attributes']['$ref'] = $prefix.$key;
 
-        $collectionProperties = [
-            'data' => [
-                'type' => 'array',
-                'items' => $properties['data'],
-            ],
+        $properties['data'] = [
+            'type' => 'array',
+            'items' => $properties['data'],
         ];
 
-        if (isset($properties['included'])) {
-            $collectionProperties['included'] = $properties['included'];
-        }
-
         $schema['description'] = "$definitionName collection.";
         $schema['allOf'] = [
             ['$ref' => $prefix.(false === $operation->getPaginationEnabled() ? self::COLLECTION_BASE_SCHEMA_NAME_NO_PAGINATION : self::COLLECTION_BASE_SCHEMA_NAME)],
-            ['type' => 'object', 'properties' => $collectionProperties],
+            ['type' => 'object', 'properties' => $properties],
         ];
 
         return $schema;