Remove the Context Menu in TinyMCE

In version 5, context menu is built in the core. This has helped me:

tinymce.init({
    ...
    contextmenu: false,
    ...
});

The easy solution is to remove the contextmenu plugin in your tinymce init:

 plugins : "inlinepopups,insertdatetime,fullscreen,contextmenu",

becomes

 plugins : "inlinepopups,insertdatetime,fullscreen",