Changes

debian: python3-osmopy-utils does not need python3-treq

This module is only used by scripts/{ctrl2cgi.py,soap.py}, which
have been deprecated and are no longer part of the package.

Change-Id: I8a36109de244efaaa40bf5ac309bd5061cf0596d
Fixes: 36cfd17 ("setup.py: do not install scripts/{soap,ctrl2cgi}.py")