How do I delete a template in OfficeWriter?
‘File’ > ‘Templates’ > ‘Manage Templates’ > … (as obvious)
Lupp’s answer isn’t quite right and it’s not obvious. Here’s the solution: Open LibreOffice and on the left side of the screen select Templates>Manage Templates. Then Control>click on the template and you will see options to rename, delete, etc.
@Lupp’s answer is perfectly correct, given that you have asked “How do I delete a template in OfficeWriter?” (emphasis mine). So, if you have already opened LibreOffice Writer, then the menu path as indicated by Lupp is the right one.
Your answer is right if you start from LibreOffice Start Center.
Also on my system, this requires right-click, not ctrl+click.