docs: Drop mention of teuthology-coverage
The command was dropped in
@@ -30,7 +30,6 @@ If you are new to teuthology and simply want to run existing tests, check out
Provided Utilities
==================
* :ref:`teuthology` - Run individual jobs
-* ``teuthology-coverage`` - Analyze code coverage via lcov
* :ref:`teuthology-kill` - Kill running jobs or entire runs
* :ref:`teuthology-lock` - Lock, unlock, and update status of machines
* :ref:`teuthology-ls` - List job results by examining an archive directory
