Do I need a piece of confirmation paper for PR in my passport?

[OntarioBound]

They attached a piece of paper called Confirmation of Permanent Residency in my passport when I landed (It says it's not for travel). I already have a PR card. Am I supposed to keep this in my passport or I can detach it now since I have a formal PR card?

Thank you!

 

[CDNPR2014]

once you have your pr card, you can take it out. keep it in a safe place in case you lose your pr card and/or will want to apply for citizenship down the road.

 

[OntarioBound]

Thanks!