Presumably as an April Fools' joke, LineageOS added an undismissable notification informing users that, "You might be a victim of software counterfeiting"

Removing it requires updating to another build or rebooting into recovery and changing a setting using terminal via setprop .

instructions: Okay I finally managed to solve the LineageOS Settings"You might be a victim of counterfeiting" april fools joke. Here are the steps to how I solved it 1. Boot in to TWRP-recovery 2. Open Terminal under the advanced tap 3. Type the following "setprop persist.lineage.nofool true" in the terminal 4. Reboot the phone and voila :)