Revert "Fix race condition when mounting loops."
Revert "Fix race condition when mounting loops."

The mount command in this CL doesn't work, and I guess was not used in the buildbot run I used to test it. So I'm just reverting the CL for now.

This reverts commit 496fa1862fd6dd71c246999dc15022b8f787e098

Change-Id: If955ede831b07e4c75db3de0781e4eeaa0ac845c
Reviewed-on: http://gerrit.chromium.org/gerrit/6491
Reviewed-by: Daniel Erat <69d56254d3d393520d06e9838c23c147a5fee7d9@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

coreos/dev-util,coreos/dev-util,coreos/dev-util,mgireesh05/dev-util,marineam/coreos-dev-util,mgireesh05/dev-util,marineam/coreos-dev-util,mgireesh05/dev-util