In some cases site owner has to start the workflow which is attached to a SharePoint list / library manually. At the same time, member user who is editing the document should not see the Workflows menu in the SharePoint list context menu.
How to hide workflow menu from SharePoint list context menu & Ribbon Menu?
Add the following script in CEWP where ever required and hide any context menu. The below script is an example to hide “Workflows” menu from the SharePoint item context menu