Use Action Cable to update notes in real-time
What does this MR do and why?
Removes the action_cable_notes
feature flag since this has been enabled on GitLab.com for more than 2 weeks now.
Instead of polling the notes endpoint regularly, we use Action Cable to signal that a change has been made and then we request the updated notes. This results in more immediate updates.
Related to #412823 (closed)
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #412823 (closed)
Edited by Heinrich Lee Yu