Fixed tests

Author: niemyjski

src/Foundatio.Parsers.LuceneQueries/Visitors/AssignOperationTypeVisitor.cs

@@ -17,11 +17,6 @@ public override Task VisitAsync(GroupNode node, IQueryVisitorContext context)
 
         if (node.Left is not TermNode leftTerm)
         {
-            // For sub aggregations we need to see if there is a parent with parens
-            var closestParentWithParens = node.GetGroupNode();
-            if (closestParentWithParens is { HasParens: true })
-                return base.VisitAsync(node, context);
-
             context.AddValidationError($"Aggregations ({node.Field}) must specify a field.");
             return Task.CompletedTask;
         }
@@ -46,14 +41,6 @@ public override void Visit(TermNode node, IQueryVisitorContext context)
         if (node.HasOperationType())
             return;
 
-        if (String.IsNullOrEmpty(node.Field))
-            return;
-
-        // For sub aggregations we need to see if there is a parent with parens
-        var closestParentWithParens = node.GetGroupNode();
-        if (closestParentWithParens is { HasParens: true })
-            return;
-
         if (String.IsNullOrEmpty(node.Field) && !String.IsNullOrEmpty(node.Term))
         {
             context.AddValidationError($"Aggregations ({node.Term}) must specify a field.");