Sequence item del vs. delete?

[Araq]

Not a bug, documented here:

<https://nim-lang.org/docs/system.html#system-module-seqs>

<https://nim-lang.org/docs/system.html#del,seq[T],Natural>

<https://nim-lang.org/docs/system.html#delete%2Cseq%5BT%5D%2CNatural>