Remove the canned-responses endpoint (original) (raw)

This contributes to #9090.

The canned-responses endpoint, which just returns a list of existing canned responses, was never used. As we are planning on getting rid of all references to canned responses, this needs to go too.

For QA:

Verify that the canned-responses endpoint no longer exists, and make sure that other reviewers endpoints continue to work as expected.

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