Remove toasts - they are likely inaccessible

[nonprofittechy]

https://adamsilver.io/blog/can-you-make-toast-messages-accessible/

Errors should be inline (and actually we are already using a mix of inline/toasts, so this should be more consistent)

[nonprofittechy]

I think most of these are gone already, but can do a further audit

[nonprofittechy]

@mnewsted — tagging for visibility on this Illinois feedback item.