No and yes .You must delink from the app .Just do it ring them up or e mail .Remove your roofie even if parked in your garden .The removal from the app is a NTA requirement deal with welfare later if the issue arises .Two totally different issues.
My roofsign is in the boot and my insurance was paid when the restrictions came in so I didn't see any advantage in de-linking. I didn't read the single line in the mid-April email about de-linking either.
Problem for me is I have family who live outside of Dublin. In case of emergency, I figured I could stick the roofsign on (essential service) and get through any roadblocks. Probably a bit moot as it turned out. An 80yr old in-law (non-taxi) drove 50kms and told the Guards he was going up to do his (50yr old) daugher's gardening. They let him through...
Also, I can prove I wasn't working because I printed out a receipt (with job number) from the tamper-proof meter when the restrictions started. If I printed another receipt today (2 months later), it would be job number+1.