Deletes the variable that is within the saved player file persistence
context of the entity. Since rooms cannot be saved to player files and
there can only ever be one instance of a room with a given vnum, this
function has identical functionality to the %setSavedVar() function when
applied to a room. The entity may be a pointer to a room, mob, or object.
It may also be a keyword of a mob or object or the vnum of a room. If the
variable is not found then null is returned. These variables are saved in
the player's data file and are restored whenever the player re-enters the
game.
Example:
%deletePlayerVar( @n, lastEnteredSkurvash ) | 