removed useless field definition visitor

lib/generator.dart

@@ -113,12 +113,10 @@ QueryDefinition generateQuery(
   final className = ReCase(queryName).pascalCase;
 
   final schemaVisitor = SchemaDefinitionVisitor();
-  final fieldVisitor = FieldDefinitionVisitor();
   final objectVisitor = ObjectTypeDefinitionVisitor();
 
   schema.accept(schemaVisitor);
   schema.accept(objectVisitor);
-  schema.accept(fieldVisitor);
 
   final rootTypeName = schemaVisitor.schemaDefinitionNode.operationTypes
       .firstWhere((e) => e.operation == operation.type, orElse: () => null)

lib/visitor.dart

@@ -1,30 +1,5 @@
 import 'package:gql/ast.dart';
 
-/// Visits all field definition nodes recursively
-class FieldDefinitionVisitor extends RecursiveVisitor {
-  /// Stores all field definition nodes
-  Iterable<FieldDefinitionNode> types = [];
-
-  @override
-  void visitFieldDefinitionNode(
-    FieldDefinitionNode node,
-  ) {
-    types = types.followedBy([node]);
-    super.visitFieldDefinitionNode(node);
-  }
-
-  /// Gets object field definition node by operation name
-  FieldDefinitionNode getByName(String name) {
-    final type = types.where((type) => type.name.value == name);
-
-    if (type.isNotEmpty) {
-      return type.first;
-    }
-
-    return null;
-  }
-}
-
 /// Visits all object definition nodes recursively
 class ObjectTypeDefinitionVisitor extends RecursiveVisitor {
   /// Stores all object definition nodes