Duplicate strings in comment notification

[pavelevap]

Ticket #16271 was fixed in [30015] only partially for wp_notify_postauthor(), but missed for wp_notify_moderator(). In the end there were created several duplicate strings. We can remove 6 strings, see attached patch.

P.S. I am not sure if space before comma was intented and should be removed now? See string with IP: %2$s , %3$s.

[SergeyBiryukov]

In 31059:

Remove padding from the comment notification emails in wp_notify_moderator().

See [30015] for wp_notify_postauthor().

props pavelevap.
fixes #30930.

[SergeyBiryukov]

In 31060:

Remove space before comma in wp_notify_postauthor() and wp_notify_moderator().

see #30930.

[pavelevap]

Thank you, Sergey!