fix: remove pubnub package and associated sync with extension code

[sethkfman]

Development & PR Process

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2. Add release-xx label to identify the PR slated for a upcoming release (will be used in release discussion)
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4. Add needs-qa label when dev review is completed
5. Add QA Passed label when QA has signed off

Description

Remove pubnub dependency all legacy source code associated with deprecated sync with extension feature. Should not impact existing application functionality.

Screenshots/Recordings

NA

Issue

Progresses #???

Checklist

• [NA] There is a related GitHub issue
• [NA] Tests are included if applicable
• [NA] Any added code is fully documented

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[sethkfman]

@cortisiko @chrisleewilcox I have added spot check on release. This feature is just removing old code that is no longer accessed.

[socket-security]

New dependency changes detected. Learn more about Socket for GitHub ↗︎

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👍 No new dependency issues detected in pull request

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Pull request alert summary

Issue	Status
Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script shell injection	✅ 0 issues
Unresolved require	✅ 0 issues
Invalid package.json	✅ 0 issues
HTTP dependency	✅ 0 issues
Git dependency	✅ 0 issues
Potential typo squat	✅ 0 issues
Known Malware	✅ 0 issues
Telemetry	✅ 0 issues
Protestware/Troll package	✅ 0 issues

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📊 Modified Dependency Overview:

🚮 Removed packages: pubnub@4.27.3

[Cal-L]

Lgtm!

[Gudahtt]

LGTM! I didn't do any manual testing but I did review the code changes

[Cal-L]

lgtm!