How to remove Default Close Button

Hello,
Does anyone know a way to remove the default Close button on an Edit Form?
I have Save and Close buttons on the Bottom Panel, but a Close button still displays on the bottom of the form.
Its redundant plus confusing to the user.

this seems too simple.. but there must still be a panel operation button for Close in the Default location which exists.
Due to a glitch, SOMETIMES there is a button which does not show up in the main list of buttons.
This seems to be a button which you deleted but which didn't get deleted properly, and which will display in the app.

with CSS: .k-window-actions {display: none;}

JQuery: ${“.k-window-actions”).css.(“display”, “none”);