HOT_REMV (key$) or
The HOT_REMV function allows you to remove the hotkey definition associated with the specified key or, if you prefer, the hotkey associated with the specified Thing. If the hotkey refers to a program which has been loaded into the common heap (eg. with HOT_CHP), then this area of the common heap will also be released.
Prior to v2.26 of the Hotkey System 2, if key$ was an upper case letter, then any hotkey associated with the lower case letter would also be removed.
See HOT_OFF for further details.