Clean up tests

Author: MaggieKimani1

test/Microsoft.OpenApi.Tests/Models/OpenApiCallbackTests.cs

@@ -96,7 +96,7 @@ public class OpenApiCallbackTests
 
         [Theory]
         [InlineData(true)]
-        //[InlineData(false)]
+        [InlineData(false)]
         public async Task SerializeAdvancedCallbackAsV3JsonWorksAsync(bool produceTerseOutput)
         {
             // Arrange

test/Microsoft.OpenApi.Tests/PublicApi/PublicApi.approved.txt

@@ -190,10 +190,10 @@ namespace Microsoft.OpenApi.Extensions
     }
     public static class OpenApiTypeMapper
     {
-        public static Microsoft.OpenApi.Models.JsonSchemaType IdentifierToEnumType(string identifier) { }
         public static System.Type MapOpenApiPrimitiveTypeToSimpleType(this Microsoft.OpenApi.Models.OpenApiSchema schema) { }
         public static Microsoft.OpenApi.Models.OpenApiSchema MapTypeToOpenApiPrimitiveType(this System.Type type) { }
-        public static string ToIdentifier(Microsoft.OpenApi.Models.JsonSchemaType? schemaType) { }
+        public static string ToIdentifier(this Microsoft.OpenApi.Models.JsonSchemaType? schemaType) { }
+        public static Microsoft.OpenApi.Models.JsonSchemaType ToJsonSchemaType(this string identifier) { }
     }
     public static class StringExtensions
     {