fix: remove GraphQL tests

Author: Mateu Aguiló Bosch

tests/src/Functional/InstallationTest.php

@@ -93,15 +93,4 @@ public function testRpcMethod() {
     $this->assertEquals('/api', $output['result']['openApi']['basePath']);
   }
 
-  public function testGraphQLQuery() {
-    $query = '{"query":"query{nodeQuery{entities{entityLabel ... on NodeRecipe { fieldIngredients }}}}","variables":null}';
-    $response = $this->httpClient->post($this->baseUrl . '/graphql', [
-      'body' => $query,
-    ]);
-    $this->assertEquals(200, $response->getStatusCode());
-    $body = $response->getBody()->getContents();
-    $output = Json::decode($body);
-    $entities = $output['data']['nodeQuery']['entities'];
-    $this->assertFalse(empty($entities));
-  }
 }