chore(active-active): delete unused field

[Shaddoll]

Summary

[Brief summary of the change, including the rationale and intended effect]

Type of Change

• Add new API(s)
• Add new data type(s)
• Add new field(s) to existing data type
• Remove field(s) from data type
• Remove data type(s)
• Remove API(s)
• Other (please provide detailed description)

Data Effect

• Does it change the data stored in database?

Detailed Description

Delete unused fields of active-active which are not supposed to be used

Impact Analysis

• Backward Compatibility: No, but nobody should be using the field because the feature isn't publicly announced.
• Forward Compatibility: Yes.

Testing Plan

• Unit Tests: [Do we have unit test covering the change?]
• Persistence Tests: [If the change is related to a data type which is persisted, do we have persistence tests covering the change?]
• Integration Tests: [Do we have integration test covering the change?]
• Compatibility Tests: [Have we done tests to test the backward and forward compatibility?]

Rollout Plan

• What is the rollout plan?
• Does the order of deployment matter?
• Is it safe to rollback? Does the order of rollback matter?
• Is there a kill switch to mitigate the impact immediately?