Steps to reproduce:
1) Open the Uploader demo
2) Add some files to the file queue
3) Navigate to any of the items in the file queue
Notice that there is no mention of the remove button; however, you are able to remove with the delete key.
You can navigate down into the table row and navigate to the remove button, but it is just announced as "button". This can be triggered with the keyboard (ctrl-option-space) to remove. The trackpad interaction won't trigger the button.