There's no single button that removes every block at once, so you remove each one where you made it.
Quick Block
Soft: tap STOP, then Delete block.
Hard: wait for the timer to run out. A Hard Quick Block can't be stopped early, so it ends by itself.
Focus Sessions
You can delete a session whenever it isn't running.
On Home, open the Focus Session card and tap the session.
Tap Edit Session.
Tap Delete, then Delete again to confirm.
If a Soft session is running, tap End Session first. It ends for today, and you can then tap the pencil next to Resume Session to delete it. A Hard session can't be ended while it's running, so delete it after its time is over.
App Limits
On Home, open the App Limit card.
Tap ⋯ on the limit, then Delete limit.
Tap Delete to confirm.
The limit is gone straight away and its apps go back to unlimited use. This can't be undone.
Uninstall protection
If you turned on Uninstall protection, it stays on after your blocks are gone. To turn it off, open Profile and tap Uninstall protection → Disable protection.
Related: How do I edit or delete a Focus Session? · How do I change or delete an App Limit? · What happens if I delete Slow Time Club?
Still stuck? Contact us from Profile → Help and Legal → Contact support and include your User ID (Help and Legal → User ID).