Remove unused variable.

lib/cli.js

@@ -504,7 +504,6 @@ program
   .action(function() {
     var log = logger.createLogger('cli:local')
       , options = cliutil.lastArg(arguments)
-      , db = require('./db')
 
     // Each forked process waits for signals to stop, and we run over the
     // default limit of 10. So, it's not a leak, but a refactor wouldn't hurt.