Remove recursive Ref and recursive anchor keywords as they are not supported in the latest JSON schema draft

Author: MaggieKimani1

src/Microsoft.OpenApi/Models/OpenApiSchema.cs

@@ -55,16 +55,6 @@ public class OpenApiSchema : IOpenApiAnnotatable, IOpenApiExtensible, IOpenApiRe
         /// </summary>
         public virtual string DynamicAnchor { get; set; }
 
-        /// <summary>
-        /// $recursiveAnchor - used to construct recursive schemas i.e one that has a reference to its own root, identified by the empty fragment URI reference ("#")
-        /// </summary>
-        public virtual string RecursiveAnchor { get; set; }
-
-        /// <summary>
-        /// $recursiveRef - used to construct recursive schemas i.e one that has a reference to its own root, identified by the empty fragment URI reference ("#")
-        /// </summary>
-        public virtual string RecursiveRef { get; set; }
-
         /// <summary>
         /// $defs - reserves a location for schema authors to inline re-usable JSON Schemas into a more general schema. 
         /// The keyword does not directly affect the validation result
@@ -361,8 +351,6 @@ public OpenApiSchema(OpenApiSchema schema)
             Vocabulary = schema?.Vocabulary ?? Vocabulary;
             DynamicAnchor = schema?.DynamicAnchor ?? DynamicAnchor;
             DynamicRef = schema?.DynamicRef ?? DynamicRef;
-            RecursiveAnchor = schema?.RecursiveAnchor ?? RecursiveAnchor;
-            RecursiveRef = schema?.RecursiveRef ?? RecursiveRef;
             Definitions = schema?.Definitions != null ? new Dictionary<string, OpenApiSchema>(schema.Definitions) : null;
             UnevaluatedProperties = schema?.UnevaluatedProperties ?? UnevaluatedProperties;
             V31ExclusiveMaximum = schema?.V31ExclusiveMaximum ?? V31ExclusiveMaximum;
@@ -578,8 +566,6 @@ internal void WriteV31Properties(IOpenApiWriter writer)
             writer.WriteOptionalMap(OpenApiConstants.Defs, Definitions, (w, s) => s.SerializeAsV3(w));
             writer.WriteProperty(OpenApiConstants.DynamicRef, DynamicRef);
             writer.WriteProperty(OpenApiConstants.DynamicAnchor, DynamicAnchor);
-            writer.WriteProperty(OpenApiConstants.RecursiveAnchor, RecursiveAnchor);
-            writer.WriteProperty(OpenApiConstants.RecursiveRef, RecursiveRef);
             writer.WriteProperty(OpenApiConstants.V31ExclusiveMaximum, V31ExclusiveMaximum);
             writer.WriteProperty(OpenApiConstants.V31ExclusiveMinimum, V31ExclusiveMinimum);            
             writer.WriteProperty(OpenApiConstants.UnevaluatedProperties, UnevaluatedProperties, false);

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

@@ -42,14 +42,6 @@ internal static partial class OpenApiV31Deserializer
                 "$dynamicAnchor",
                 (o, n, _) => o.DynamicAnchor = n.GetScalarValue()
             },
-            {
-                "$recursiveAnchor",
-                (o, n, _) => o.RecursiveAnchor = n.GetScalarValue()
-            },
-            {
-                "$recursiveRef",
-                (o, n, _) => o.RecursiveRef = n.GetScalarValue()
-            },
             {
                 "$defs",
                 (o, n, t) => o.Definitions = n.CreateMap(LoadSchema, t)

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

@@ -469,8 +469,6 @@ namespace Microsoft.OpenApi.Models
         public const string PropertyName = "propertyName";
         public const string Put = "put";
         public const string ReadOnly = "readOnly";
-        public const string RecursiveAnchor = "$recursiveAnchor";
-        public const string RecursiveRef = "$recursiveRef";
         public const string RefreshUrl = "refreshUrl";
         public const string RequestBodies = "requestBodies";
         public const string RequestBody = "requestBody";
@@ -901,8 +899,6 @@ namespace Microsoft.OpenApi.Models
         public virtual System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Models.OpenApiSchema> PatternProperties { get; set; }
         public virtual System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Models.OpenApiSchema> Properties { get; set; }
         public virtual bool ReadOnly { get; set; }
-        public virtual string RecursiveAnchor { get; set; }
-        public virtual string RecursiveRef { get; set; }
         public virtual Microsoft.OpenApi.Models.OpenApiReference Reference { get; set; }
         public virtual System.Collections.Generic.ISet<string> Required { get; set; }
         public virtual string Schema { get; set; }
@@ -1243,8 +1239,6 @@ namespace Microsoft.OpenApi.Models.References
         public override System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Models.OpenApiSchema> PatternProperties { get; set; }
         public override System.Collections.Generic.IDictionary<string, Microsoft.OpenApi.Models.OpenApiSchema> Properties { get; set; }
         public override bool ReadOnly { get; set; }
-        public override string RecursiveAnchor { get; set; }
-        public override string RecursiveRef { get; set; }
         public override System.Collections.Generic.ISet<string> Required { get; set; }
         public override string Schema { get; set; }
         public override string Title { get; set; }