Remove Ring from Amazon shared credentials

[plttn]

Based on some research I've done I don't see any immediate evidence of Ring ever explicitly sharing with an Amazon account. While it's possible to link the accounts for features like Alexa, sources/documentation indicate explicitly that the Ring account remains just a Ring account.

Sources:

https://blog.ring.com/about-ring/ring-now-part-amazon-family/

Nothing! Your Ring account and the Ring App will stay the same, so you’ll continue to have a superior Ring experience.

https://support.ring.com/hc/en-us/articles/360034187232-Linking-Your-Ring-and-Amazon-Accounts

(no mention of shared credentials)

Testing with my Amazon account credentials results in a "check your username and password" error.

Overall Checklist

• [x] I agree to the project's Developer Certificate of Origin
• [x] The top-level JSON objects are sorted alphabetically
• [x] There are no open pull requests for the same update

for shared-credentials-historical.json

• [x] You believe that the domains were associated at some point in the past and can explain that relationship

[Sameesunkaria]

Can you please run the tools/convert-shared-credential-to-legacy-format.rb script to update some generated files?

[Sameesunkaria]

Thank you @plttn 😊