`updateDrawableProperties` is dead code

[adroitwhiz]

Expected Behavior

There should not be dead code in the codebase

Actual Behavior

The updateDrawableProperties function has been completely phased out. #469 added individual update functions for each property, and scratchfoundation/scratch-vm#2329 removed the last of the calls to updateDrawableProperties, replacing them with the new update functions.

As such, updateDrawableProperties is no longer called anywhere and can be removed.