Update faculty / department emails for Course Details error reporting

[kokrui]

We have a "Report Errors" button on each Course Detail page. (See #3784)

However, some faculty emails listed there should be deprecated (e.g., GEQ1000, a course that no longer exists), and there are new emails which should be added.

We should incrementally improve this! If you notice data that should be added / removed / updated, please make a PR or issue to update https://github.com/nusmodifications/nusmods/blob/master/website/src/data/facultyEmail.json

[dasha3412]

Hi, I'd like to work on this

[itstrueitstrueitsrealitsreal]

Hi, wanted to ask about how we wanna go about doing this, do we wanna remove all the departments that no longer exist and all the emails for courses that no longer exist? Having a little trouble deciding which to remove in my PR.

[kokrui]

I think eventually we'd want to remove all unused emails, but I'd be happy to accept PRs that make any sort of incremental progress (e.g. removing one or the other or any subset)!

[itstrueitstrueitsrealitsreal]

Sounds good, I'll start working on it!