Remove redundant uuid module

The makefile for OpenCivic adds the UUID module for Drupal to its /devel modules subdirectory. Now that OpenCivic is built on top of Panopoly, however, this conflicts with the Panopoly Core module, whose makefile adds the UUID module for Drupal to the /contrib modules subdirectory. The result is that two copies of the UUID module get added to the codebase, causing errors.

To fix this, we should remove the UUID module from the OpenCivic makefile.