Remove real-time collaboration: Backport to the 7.0 branch

[desrosj]

Stages the backport to the 7.0 branch to resolve merge conflicts

Removes all RTC related code from core. There will still be RTC related code in Gutenberg, but effectively disabled for core since nothing turns it on. The wp.sync global has also been hidden by bundling in WordPress/gutenberg#78085.

Developed in: #11774.

Props maxschmeling, ellatrix, mukesh27.
Fixes #65205.

Trac ticket: Core-65205.

Use of AI Tools

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[ellatrix]

Oh, @maxschmeling's branch initially targeted the 7.0 branch, I didn't realize there might be conflicts.

[github-actions]

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[desrosj]

Oh, @maxschmeling's branch initially targeted the 7.0 branch, I didn't realize there might be conflicts.

@maxschmeling can you confirm that everything looks good in trunk? If it does, then the process we can follow to backport this one can be:

• Checkout branches/7.0
• Run npm run grunt patch:URLOFORIGINALPRWITH7.0ASBASE
• svn merge -c 62334 --record-only (this will not attempt to actually merge the changes, it only updates the svn:mergeinfo)
• Commit.

[maxschmeling]

@maxschmeling can you confirm that everything looks good in trunk?

As far as I can tell it is. I tested the PR with the removal. Everything looked good there. And it appears to be applied to trunk correctly.

[maxschmeling]

@maxschmeling can you confirm that everything looks good in trunk?

As far as I can tell it is. I tested the PR with the removal. Everything looked good there. And it appears to be applied to trunk correctly.

I've tested trunk and had Opus take a look too. Not seeing any problems.

[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 62338
GitHub commit: 2f7a19e

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.