T9142: Update userbase.kde.org and remove outdated information

[Thiago Sueto]

thiagosueto added a project: Plasma Accessibility.

TASK DETAIL
  https://phabricator.kde.org/T9142

To: thiagosueto
Cc: alexde, thiagosueto, schweingruber, jucato, skadinna, GB_2, afarid, neofytosk, yurchor, ognarb, #documentation, #kde_promo, xyquadrat, LeGast00n, The-Feren-OS-Dev, jraleigh, gennad, fbampaloukas, chempfling, ragreen, lavender, domson, davidc, Anachronox, nauticalnexus, ndavis, nicolasfella, ZrenBot, James, nalmeida, ngraham, alexeymin, rgomezantoli, himcesjf, lesliezhai, ali-mohamed, s8321414, jensreuterberg, jriddell, totte, tcanabrava, lydia, valorie, abetts, gladhorn, sebas, apol, ltoscano, repinc, ahiemstra, mart
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