Removed loopback-testing dependency from package.json

[cskinner74]

Pre-Submission Checklist

• [-] Your pull request targets the staging branch of FreeCodeCamp.
• [-] Branch starts with either fix/, feature/, or translate/ (e.g. fix/signin-issue)
• [-] You have only one commit (if not, squash them into one commit).
• [-] All new and existing tests pass the command npm run test-challenges. Use git commit --amend to amend any fixes.

Type of Change

• [-] Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)
• Add new translation (feature adding new translations)

Checklist:

• [-] Tested changes locally.
• Closes currently open issue (replace XXXX with an issue no): Closes #XXXX

Description

Removed the loopback-testing dependency from package.json

[raisedadead]

Refers #10017

[raisedadead]

@sync350 thanks!

✨ And congratulations on your first contribution to Free Code Camp. ✨

[cskinner74]

@raisedadead Thank you for giving me the opportunity to contribute!