I think you just need to reload the page for the ‘delete’ option to become available to your retracted comment, but that it’s only possible if it hasn’t yet been responded to. So the very fact you asked about how to delete it under your original post, meant that you no longer could.
Someone with moderator/admin rights should be able to delete it entirely—if anyone with those rights passes by here then please do so. Sorry for the inconvenience.
I think you just need to reload the page for the ‘delete’ option to become available to your retracted comment, but that it’s only possible if it hasn’t yet been responded to. So the very fact you asked about how to delete it under your original post, meant that you no longer could.
Someone with moderator/admin rights should be able to delete it entirely—if anyone with those rights passes by here then please do so. Sorry for the inconvenience.