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Once you add widgets to this sidebar, this default information will go away.
Widgets can be added by going to your dashboard (wp-admin) -> Appearance -> Widgets, drag a widget you want to see into one of the appropriate sidebars.
Hahaha … maybe they were taken off as it was too rare to receive any other @*^# response! 🙂
LOL! They were actually removed in the late 1800s during the Victorian Era when swearing became an absolute no, no… 😉 SNORT!