Revert "Reapply "update samples""

This reverts commit e45f0e6.

Author: Picazsoo

modules/openapi-generator/src/main/resources/kotlin-spring/oneof_interface.mustache

@@ -11,7 +11,8 @@
     JsonSubTypes.Type(value = {{classname}}::class){{^-last}},{{/-last}}
   {{/interfaceModels}}
 )
-{{/jackson}}{{/useDeductionForOneOfInterfaces}}{{/discriminator}}{{#additionalModelTypeAnnotations}}
+{{/jackson}}{{/useDeductionForOneOfInterfaces}}{{/discriminator}}
+{{#additionalModelTypeAnnotations}}
 {{{.}}}
 {{/additionalModelTypeAnnotations}}
 {{#vendorExtensions.x-class-extra-annotation}}

samples/client/petstore/csharp/generichost/latest/NullTypes/src/Org.OpenAPITools/Client/ClientUtils.cs

@@ -301,35 +301,6 @@ public static bool IsJsonMime(string mime)
             throw new JsonException("The specified discriminator was not found.");
         }
 
-        /// <summary>
-        /// Determines if the provided header is a content header
-        /// </summary>
-        /// <param name="header">The header to check</param>
-        /// <returns>True if a content header; False otherwise</returns>
-        public static bool IsContentHeader(string header)
-        {
-            return ContentHeaders.Contains(header.ToLowerInvariant());
-        }
-
-        /// <summary>
-        /// The collection of content headers as per
-        /// https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpcontent.headers
-        /// </summary>
-        private static readonly string[] ContentHeaders = new String[] 
-        {
-            "allow",
-            "content-encoding",
-            "content-disposition",
-            "content-language",
-            "content-length",
-            "content-location",
-            "content-md5",
-            "content-range",
-            "content-type",
-            "expires",
-            "last-modified"
-        };
-
         /// <summary>
         /// The base path of the API
         /// </summary>