Drop rating title

[eviljeff]

New frontend doesn't allow you to set a rating title, so we're going to drop it from the model and database (and thus in legacy frontend too)

[muffinresearch]

Presumably this is blocked on switching fully to the new frontend?

[eviljeff]

I was going to drop it entirely, from legacy frontend too.

[AlexandraMoga]

Verified as fixed on AMO -dev with FF60, Win10x64

The rating title has been removed on the legacy site from Write a Review component and from the Reviews listing page:

[1] Add-on review

[2] Theme review

[3] Reviews listing