The beauty of AzureDevOps is you can add & delete your own states to AzureDevOps without modifying the templates
Here let us see about how to delete new states to a Agile template in AzureDevOps
pre-requisite: You should be one of the Administrators of the organization to hide Process templates
Step 1: Go to Organization Settings —> Process
Step 2: Click on Process template on which you want to modify the states
Step 3: Click on the WorkItem Type you want to add the states (Bug or UserStory etc.,)
Step 4: Once you click on the WorkItem type say “Bug” you will get the process template displayed as seen below
Step 5: Then Click on “States” as shown
Step 6: Click on the 3 dots next to it and then click on “Hide” as shown below
Step 7: Once it is hidden you won’t be able to see the New state anywhere
Step 8: And any of the states could be hidden in case you want to use it for future purposes
And also we can do the below stuff with these states..
Hiding any state in Azure DevOps
Deleting a state in Azure DevOps
Editing & Renaming states in Azure DevOps
Adding new states in Azure DevOps
Removing Closed state in Azure DevOps