deleteType support in loopback 2.x

[snarjuna]

Description

deleteType to remove type from existing types. This is equivalent to deleteType for typeRegistry which exist in loopback 2.x

Related issues

• connect to Implement deleteType to support delete model in loopback 2.x #453

Checklist

• New tests added or existing tests modified to cover all changes
• Code conforms with the style
  guide

[slnode]

Can one of the admins verify this patch? To accept patch and trigger a build add comment ".ok\W+to\W+test."

[snarjuna]

@bajtos As per our discussion, I have created a PR to support delete types. Please review and merge

[bajtos]

thank you @snarjuna for the pull request! The changes look good, let's fix the CI checks now.

commits in this PR have formatting problems

Our commit message conventions are described here: https://loopback.io/doc/en/contrib/git-commit-messages.html Most importantly, we use imperative form instead of past tense.

While you are making those changes, please squash both commits into single one (git rebase -i master && git push -f).

One or more of this commit's parents has contributors who have not signed the Contributor License Agreement.

Please sign the CLA here:
https://cla.strongloop.com/agreements/strongloop/strong-remoting

Unfortunately, this step is required from IBMers too.

[snarjuna]

@bajtos I have resolved your comments. Can you please merge now

[bajtos]

Landed. 🎉 Thank you for the contribution! ❤️