chore: remove NFT collections API calls and getNFTContractInfo function

[juanmigdr]

Explanation

References

https://consensyssoftware.atlassian.net/browse/ASSETS-1923

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've communicated my changes to consumers by updating changelogs for packages I've changed
• [ ] I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them