Revert "[DataStoreFactory] Add a function to ceate a DataStore from IncidentTrackerInfo"

This reverts commit aaf3698a9b10076a40443bb7d172f072fdfb0db0.

I'll create ArmIncidentTracker directly at UnifiedDataStore.
Revert "[server] Add DataStoreRedmine"

This reverts commit acc2981c2318d592c5c19ae7be1f7ec81c5676d8.

I'll create ArmIncidentTracker directly at UnifiedDataStore.