fix failing delete by query with slice unit test on expected json

Author: Mpdreamz

src/Tests/Document/Multiple/DeleteByQuery/DeleteByQueryApiTests.cs

@@ -230,7 +230,7 @@ public DeleteByQueryWithSlicesApiTests(IntrusiveOperationCluster cluster, Endpoi
 			new
 			{
 				slice = new { id = 0, max = 2 },
-				query = new { terms = new { name = new { terms = FirstTenProjectNames } } }
+				query = new { terms = new { name = FirstTenProjectNames } }
 			};
 
 		protected override DeleteByQueryDescriptor<Project> NewDescriptor() => new DeleteByQueryDescriptor<Project>(this.CallIsolatedValue);