Cleanup orphaned code from cinder root directory

Cleanup orphaned code from cinder root directory

There were several methods in the root directory source files
that were no longer being used anywhere. While some of these
have potential for being useful, they are not in use and should
not be sitting around the codebase waiting for someone to need them.

This patch removes unused methods from utils as well as their
associated unit tests.

Change-Id: Iee5bac44b41a2696ab972a2fbfe0281ec423b393