This question is an exact duplicate of:
Deleting comments on a post, outside the flag queue, requires no prompt.
Deleting comments on a flagged post (whether a comment or other flag) requires confirmation each time. This isn't a problem if someone flags all comments, but normally "too chatty" indicates other problem comments too.
Issues with current state
My workflow when moderating comment cleanup is to open the post in a new tab so I can more quickly delete and cleanup comments. This is annoyingly inefficient.
Desired future state
Remove confirmation in flag queue for deleting comments.