Remove unnecessary code

Author: irvinesunday

src/Microsoft.OpenApi/Models/OpenApiDocument.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System;
@@ -692,12 +692,6 @@ public JsonSchema FindSubschema(Json.Pointer.JsonPointer pointer, EvaluationOpti
         {
             throw new NotImplementedException();
         }
-
-        internal JsonSchema ResolveJsonSchemaReference(Uri reference)
-        {
-            var referencePath = string.Concat("https://registry", reference.OriginalString.Split('#').Last());
-            return (JsonSchema)SchemaRegistry.Global.Get(new Uri(referencePath));
-        }
     }
 
     internal class FindSchemaReferences : OpenApiVisitorBase

src/Microsoft.OpenApi/Reader/V3/OpenApiDocumentDeserializer.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using Microsoft.OpenApi.Extensions;
@@ -50,7 +50,6 @@ public static OpenApiDocument LoadOpenApi(RootNode rootNode)
         {
             var openApiDoc = new OpenApiDocument();
             var openApiNode = rootNode.GetMap();
-            var openApiDoc = new OpenApiDocument();
 
             ParseMap(openApiNode, openApiDoc, _openApiFixedFields, _openApiPatternFields);
 

src/Microsoft.OpenApi/Reader/V31/OpenApiDocumentDeserializer.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.Reader.ParseNodes;
@@ -49,7 +49,6 @@ public static OpenApiDocument LoadOpenApi(RootNode rootNode)
         {
             var openApiDoc = new OpenApiDocument();
             var openApiNode = rootNode.GetMap();
-            var openApiDoc = new OpenApiDocument();
 
             ParseMap(openApiNode, openApiDoc, _openApiFixedFields, _openApiPatternFields);