Remove gatsby-plugin-og-image dependency on gatsby-theme-notes

[danilofuchs]

Summary

I Propose we remove gatsby-plugin-og-image from all of Gatsby's projects.

Motivation

Yarn v2 (berry) is having issues building Gatsby, as gatsby-plugin-og-image depends on an old version of jimp, which contains transitive dependencies and security vulnerabilities, as stated in this PR.

Check the E2E tests in berry repo to see the issue.

It seems like gatsby-plugin-og-image is not maintained at all. It only has one version, no Github repo attached to the npm package and only a few dependants.