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 ENG-4810
Ran flow to make sure I didn't miss anything, and repeated the test plan from D9028
Going to handle this in D9028