remove some redundant interfaces

src/Microsoft.OpenApi/Models/OpenApiCallback.cs

@@ -11,7 +11,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Callback Object: A map of possible out-of band callbacks related to the parent operation.
     /// </summary>
-    public class OpenApiCallback : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiCallback>
+    public class OpenApiCallback : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiCallback>
     {
         /// <summary>
         /// A Path Item Object used to define a callback request and expected responses.

src/Microsoft.OpenApi/Models/OpenApiExample.cs

@@ -11,7 +11,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Example Object.
     /// </summary>
-    public class OpenApiExample : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiExample>
+    public class OpenApiExample : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiExample>
     {
         /// <summary>
         /// Short description for the example.

src/Microsoft.OpenApi/Models/OpenApiHeader.cs

@@ -13,7 +13,7 @@ namespace Microsoft.OpenApi.Models
     /// Header Object.
     /// The Header Object follows the structure of the Parameter Object.
     /// </summary>
-    public class OpenApiHeader : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiHeader>
+    public class OpenApiHeader : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiHeader>
     {
         /// <summary>
         /// Indicates if object is populated with data or is just a reference to the data

src/Microsoft.OpenApi/Models/OpenApiLink.cs

@@ -10,7 +10,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Link Object.
     /// </summary>
-    public class OpenApiLink : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiLink>
+    public class OpenApiLink : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiLink>
     {
         /// <summary>
         /// A relative or absolute reference to an OAS operation.

src/Microsoft.OpenApi/Models/OpenApiParameter.cs

@@ -13,7 +13,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Parameter Object.
     /// </summary>
-    public class OpenApiParameter : IOpenApiSerializable, IOpenApiReferenceable, IEffective<OpenApiParameter>, IOpenApiExtensible
+    public class OpenApiParameter : IOpenApiReferenceable, IEffective<OpenApiParameter>, IOpenApiExtensible
     {
         private bool? _explode;
         /// <summary>

src/Microsoft.OpenApi/Models/OpenApiPathItem.cs

@@ -11,7 +11,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Path Item Object: to describe the operations available on a single path.
     /// </summary>
-    public class OpenApiPathItem : IOpenApiSerializable, IOpenApiExtensible, IOpenApiReferenceable, IEffective<OpenApiPathItem>
+    public class OpenApiPathItem : IOpenApiExtensible, IOpenApiReferenceable, IEffective<OpenApiPathItem>
     {
         /// <summary>
         /// An optional, string summary, intended to apply to all operations in this path.

src/Microsoft.OpenApi/Models/OpenApiRequestBody.cs

@@ -13,7 +13,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Request Body Object
     /// </summary>
-    public class OpenApiRequestBody : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiRequestBody>
+    public class OpenApiRequestBody : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiRequestBody>
     {
         /// <summary>
         /// Indicates if object is populated with data or is just a reference to the data

src/Microsoft.OpenApi/Models/OpenApiResponse.cs

@@ -11,7 +11,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Response object.
     /// </summary>
-    public class OpenApiResponse : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiResponse>
+    public class OpenApiResponse : IOpenApiReferenceable, IOpenApiExtensible, IEffective<OpenApiResponse>
     {
         /// <summary>
         /// REQUIRED. A short description of the response.

src/Microsoft.OpenApi/Models/OpenApiSchema.cs

@@ -12,7 +12,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Schema Object.
     /// </summary>
-    public class OpenApiSchema : IOpenApiSerializable, IOpenApiReferenceable, IEffective<OpenApiSchema>, IOpenApiExtensible
+    public class OpenApiSchema : IOpenApiReferenceable, IEffective<OpenApiSchema>, IOpenApiExtensible
     {
         /// <summary>
         /// Follow JSON Schema definition. Short text providing information about the data.

src/Microsoft.OpenApi/Models/OpenApiSecurityScheme.cs

@@ -12,7 +12,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Security Scheme Object.
     /// </summary>
-    public class OpenApiSecurityScheme : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
+    public class OpenApiSecurityScheme : IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>
         /// REQUIRED. The type of the security scheme. Valid values are "apiKey", "http", "oauth2", "openIdConnect".

src/Microsoft.OpenApi/Models/OpenApiTag.cs

@@ -10,7 +10,7 @@ namespace Microsoft.OpenApi.Models
     /// <summary>
     /// Tag Object.
     /// </summary>
-    public class OpenApiTag : IOpenApiSerializable, IOpenApiReferenceable, IOpenApiExtensible
+    public class OpenApiTag : IOpenApiReferenceable, IOpenApiExtensible
     {
         /// <summary>
         /// The name of the tag.