Revert 3 unread-related commits. #968

This reverts commits:
 - c49c201d91de6484e07c07650619d7924b192ffb
 - f95acfd134a9ed14d4293b1fb0896566d3c4721c
 - 846efbd013a5e8bb6e4361c842b20da10b17f587