Clean up a bunch of unused/dead code.

Found code using vulture: http://pypi.python.org/pypi/vulture

BUG=chromium-os:36814
TEST=All unittests pass.

Change-Id: I55cd37d43fe794733936f73aacbaecaedd31b6bd
Reviewed-on: https://gerrit.chromium.org/gerrit/38968
Commit-Ready: Chris Sosa <sosa@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
diff --git a/run_unittests b/run_unittests
index 5eb9331..a4f9ddc 100755
--- a/run_unittests
+++ b/run_unittests
@@ -43,5 +43,6 @@
 
 # Invoke unit test scripts.
 for unittest_script in *_unittest.py; do
+  echo "Running $unittest_script":
   ./${unittest_script} || test ${force_all} || break
 done