Removing the Conversation Tab is being reviewed by the feature team.
For deleting chat messages, please following progress here: https://microsoftteams.uservoice.com/forums/555103/suggestions/33535006.
An error occurred while saving the commentFiona commented
Allow us to modify the settings to stay "Available". Lots of nice features in Skype are lost in Teams. Generally Teams are worse than Skype .
Thank you for your feedback! The team has finalized the designs for this feature request, and work is planned to begin shortly. We will share an update as soon as one is available.