Most kneeboards these days come with this sort of information printed on them, e.g. morse, transponder codes, interception procedures, RT calls etc.
Yes. Typically relevant for the US, with the FAA flight plan form etc. Useless. As said, I covered most of the stuff with stickers on which I have my own relevant info.
I just dug out my kneeboard and found another sticker I didn't mention: wake turbulence separation times/distances relevant to light aircraft.
And the three bits I did not cover over (yet) is the morse code list, the semi-circular rule and the light gun signals.