Revert "QPID-4687: Add uninstall make target to cmake build"

This reverts the uninstall target added in r1463540, it was not accepted for 0.22 release.
It leaves in place fixes to the python intall tartget that were in the same commit.

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/0.22@1477640 13f79535-47bb-0310-9956-ffa450edef68