Revert "Added 'C-qC-q' command to tmux."

This reverts commit f74d70d4554a3ab00c0432b94ca3c3f34add0bf9.
Revert "Set ctrl-q as prefix for tmux."

This reverts commit abf8a7622d76e63fe5c4a940a346cbf0c547f5c9.