Remove a misleading comment about self.render() behavior. The former comment suggested that View.render called with 'row' or 'col' would set cw_row or cw_col, which is not (anymore ?) accurate. Related to #3696871.

usr/bin/cubicweb-ctl usr/bin/
usr/lib/PY_VERSION/*-packages/cubicweb/cwctl.py
../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl