Revert "Add todos to be able to close some tabs."

This reverts commit 414d7a2bcb71ea2f8d30f231cb6d3f0c492451f6.
Revert 414d7a2..b0031da

This rolls back to commit 414d7a2bcb71ea2f8d30f231cb6d3f0c492451f6.
Revert 602f974..43083d4

This rolls back to commit 602f9745ce49e8d5c809d88bb1a6e08db5ea4865.