Read RNTAztecView.podspec from its source in Gutenberg

[mokagio]

As far as I can see, so far we duplicated RNTAztecView.podspec in this repo based on the version in Gutenberg.

This meant doing things such as synchronizing updating the WordPress-Aztec-iOS dependency in Gutenberg and then in this repo.

By reading the podspec from Gutenberg instead of duplicating it we fulfill the dependency requirement for the XCFramework without needing to update a file twice. To bump the Aztec dependency, we only need to update Gutenberg itself.

I suspect RNTAztecView.podspec was defined locally because in the past we had something that read it, but that is no longer the case, even in the legacy Gutenberg.podspec that's still tracked in the repo but no longer used in our main client, WordPress iOS. Notice how the dependency is referred in the standard form here:

gutenberg-mobile/Gutenberg.podspec

Line 27 in c70afb8

s.dependency 'RNTAztecView'

That notation means that CocoaPods would look for it among its sources. If we were reading it from the repo, we'd need to specify it with path:. That's all to say, I consider this change safe to make.

To test: Verify the XCFramework published successfully.

PR submission checklist:

• I have considered adding unit tests where possible. – N.A.
• I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary. – N.A.

[fluiddot]

Now that we publish GBM via the XCFramework, I understand that the podspecs RNTAztecView and Gutenberg are no longer needed. I checked that the XCFramework was published successfully and E2E tests passed, so this PR LGTM 🎊 !