Remove duplicate node

Author: Jason Zhai

src/Containers/Microsoft.NET.Build.Containers/Resources/Strings.Designer.cs

@@ -489,8 +489,4 @@
     <value>CONTAINER2031: The container image format '{0}' is not supported. Supported formats are '{1}'.</value>
     <comment>{StrBegins="CONTAINER2031: "}</comment>
   </data>
-  <data name="InvalidContainerImageFormat" xml:space="preserve">
-    <value>CONTAINER2031: The container image format '{0}' is not supported. Supported formats are '{1}'.</value>
-    <comment>{StrBegins="CONTAINER2031: "}</comment>
-  </data>
 </root>

src/Containers/Microsoft.NET.Build.Containers/Resources/Strings.resx

@@ -143,24 +143,6 @@ internal async Task<bool> ExecuteAsync(CancellationToken cancellationToken)
             }
         }
 
-        // forcibly change the media type if required
-        if (ImageFormat is not null)
-        {
-            if (Enum.TryParse<KnownImageFormats>(ImageFormat, out var imageFormat))
-            {
-                imageBuilder.ManifestMediaType = imageFormat switch
-                {
-                    KnownImageFormats.Docker => SchemaTypes.DockerManifestV2,
-                    KnownImageFormats.OCI => SchemaTypes.OciManifestV1,
-                    _ => imageBuilder.ManifestMediaType // should be impossible unless we add to the enum
-                };
-            }
-            else
-            {
-                Log.LogErrorWithCodeFromResources(nameof(Strings.InvalidContainerImageFormat), ImageFormat, string.Join(",", Enum.GetValues<KnownImageFormats>()));
-            }
-        }
-
         Layer newLayer = Layer.FromDirectory(PublishDirectory, WorkingDirectory, imageBuilder.IsWindows, imageBuilder.ManifestMediaType);
         imageBuilder.AddLayer(newLayer);
         imageBuilder.SetWorkingDirectory(WorkingDirectory);