Revert test source updates

Co-authored-by: baywet <7905502+baywet@users.noreply.github.com>

Author: Copilot

test/Microsoft.OpenAPI.OData.Reader.Tests/EdmModelOpenApiExtensionsTest.cs

@@ -143,7 +143,7 @@ private void AssertDocumentsAreEqual(string result, string fileName, string form
     {
         _output.WriteLine(result);
         var expected = Resources.GetString(fileName);
-        if (format is "json" && !fileName.Contains(".V2."))
+        if (format is "json")
         {
             var parsedJson = JsonNode.Parse(result);
             Assert.True(JsonNode.DeepEquals(JsonNode.Parse(expected), parsedJson));

test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiSchemaGeneratorTests.cs

@@ -393,8 +393,7 @@ public async Task CreateStructuredTypePropertiesSchemaWithCustomAttributeReturns
               "$ref": "#/components/schemas/microsoft.graph.userInsightsSettings"
             },
             {
-              "enum": [null],
-              "nullable": true
+              "enum": [null]
             }
           ],
           "description": "The user's settings for the visibility of meeting hour insights, and insights derived between a user and other items in Microsoft 365, such as documents or sites. Get userInsightsSettings through this navigation property.",
@@ -406,8 +405,7 @@ public async Task CreateStructuredTypePropertiesSchemaWithCustomAttributeReturns
               "$ref": "#/components/schemas/microsoft.graph.contactMergeSuggestions"
             },
             {
-              "enum": [null],
-              "nullable": true
+              "enum": [null]
             }
           ],
           "description": "The user's settings for the visibility of merge suggestion for the duplicate contacts in the user's contact list.",
@@ -419,8 +417,7 @@ public async Task CreateStructuredTypePropertiesSchemaWithCustomAttributeReturns
               "$ref": "#/components/schemas/microsoft.graph.regionalAndLanguageSettings"
             },
             {
-              "enum": [null],
-              "nullable": true
+              "enum": [null]
             }
           ],
           "description": "The user's preferences for languages, regional locale and date/time formatting.",
@@ -432,8 +429,7 @@ public async Task CreateStructuredTypePropertiesSchemaWithCustomAttributeReturns
               "$ref": "#/components/schemas/microsoft.graph.shiftPreferences"
             },
             {
-              "enum": [null],
-              "nullable": true
+              "enum": [null]
             }
           ],
           "description": "The shift preferences for the user.",
@@ -932,8 +928,7 @@ public async Task CreatePropertySchemaForNullableEnumPropertyReturnSchema(OpenAp
                     {
                       "enum": [
                         null
-                      ],
-                      "nullable": true
+                      ]
                     }
                   ],
                   "default": "yellow"