There's a string stating that the code should not be passed or the employee will be fired. I'd assume this was a test to see if an employee meant to be doing code review was actually doing them. Spoiler, they were not, as OP said they found this in production code.

My guess is a "solution" to the age-old problem of needing to store a secret in a file that the user can download, thus making the entire system insecure.

This "solution" appears to be either that the string itself is so outrageous that the user would not believe that it's the real secret when it is in fact the real secret, leveraging security through obscurity, or else it's there in place of the real secret that cannot be revealed under pain of ~~death~~ firing, and therefore is accidentally being used instead of that intended secret... so it's not secret after all.

Unless they're doing something incredibly clever to substitute that secret string for the real thing when the time is right and doing it in such a way that the user can't intercept, someone's getting fired.