`QRCodeLinkHandler` should now be redundant since we handle all QR code link handling in the new `DeepLinksContextProvider`, so we can delete the file and references to it
**This is not part of a monthly goal, just a follow-up task.**
Depends on D9028
Part of [[ https://linear.app/comm/issue/ENG-4810/combine-deep-link-handlers-listeners-into-one-component | ENG-4810 ]]