Qt: Remove wiki links

[JeremyRand]

From #67 (comment) :

The wiki should not be linked to, since it's deprecated in favor of
the Jekyll site.

[mnp]

I didn't see any mentions to wiki anywhere in the repo except one README, which I changed; see #165

[JeremyRand]

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Mitchell Perilstein:

I didn't see any mentions to wiki anywhere in the repo except one README, which I changed; see #165

This issue applies to the name management tab, which isn't currently in the master branch (it's pending a rebase).

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