Macro: Remove Macros From Buttons

I am trying to come up with some code to loop through all worksheets in the workbook and remve assigned macros from any buttons on each sheet

My code below. I type btn. and reviewed the items offered by intellisense, but nothing seemed fitting.

Sub RemoveAssignedMacro()

Dim wb As Workbook
Dim btn As Shape
Dim sht As Worksheet

Set wb = ThisWorkbook

For Each sht In wb.Worksheets
For Each btn In sht.Shapes
btn.
Next btn
Next sht

End Sub