As a self-organized team, they will decide for themselves how to best manage communication between team members. The Scrum Master will only take action if requested OR if he/she observes that there is a potential problem.

The Scrum Master is responsible for serving the team by facilitating and removing impediments to ensure there are minimal roadblocks in the way of the team. The Scrum Master also coaches the Scrum Team and organization to ensure the benefits of Scrum is realized.
"Removing every impediment for the Development Team" may seem like the right thing to do but by doing it this way, the Dev Team's ability to self-organize would be limited. There are some impediments that will depend solely on the Scrum Master and there will be some that require collaboration with the Dev Team. The former might be working with the finance department to renew services that the team is using. The latter might be lack of skills to make a particular item done. The Scrum Master can coach the team on finding different solutions to resolve the issue.
"Removing impediments" is good. "Removing every impediment for the Development Team" is not so good and sometimes not even possible.

The ones that are closest to the work are the best ones to understand and explain what the work is and what the needs of the users and product are.

Explanation/Reference:
Explanation:
The Development Team is self-organized, thus manages and decides how to manage their own progress.

The Sprint Backlog is a living artifact that evolves and changes as more is learned or discovered.