Evaluate WPCS VIP issues

As part of [WPCS's reorganisation of labels](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/1454), the `Component: VIP` is being removed, since WPCS `master` no longer contains the VIP category of sniffs.

The following Issues were still open at the time the label was removed, so these need checking to see if they still apply to any code that we now have in VIPCS:

- [x] ~https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/1379~
- [x] ~https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/662~
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/661 (Applicable to WPCS)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/461 (Applicable to WPCS)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/462 (Possibly applicable to WPCS)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/74 (Possibly applicable to WPCS)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/91 (Valid for VIPCS, but not easily sniffable)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/80 (Valid for VIPCS, but not easily sniffable)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/295 (Likely valid for VIPCS)
- [ ] https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/475 (Likely valid for VIPCS)