Why does the phrase to "86" something mean to cancel or put an end to it?

86 is one of many codes once used by soda fountain employees to
communicate quickly among themselves. Code 33 meant a
cherry-flavored Coke, Code 19 meant a banana split, and Code 86
meant they were out of a particular item. As a result, if a cook
"86'd" an order, it meant he was cancelling it.