Revert "Add |> to punctuation list"

This reverts commit f5bdbe4d493e0ffa2b3843a8cd9ffab34dabb4e0.

Conflicts:

	doc/stdlib/punctuation.rst

This is not really punctuation, just an operator. It's also not just
for function chaining, it's also used for redirection. It's also not
clear what function chaining means. Also, people shouldn't use it.