[dataimport] remove size constraint handling We do not want to silently truncate data. If that is wanted, the application-specific importer should handle that itself. [v2: Keep the get_size_constraints function so applications don't have to reimplement it if they need to keep the truncate behaviour]

usr/lib/python2*/*-packages/cubicweb/web
usr/lib/python2*/*-packages/cubicweb/wsgi
usr/share/cubicweb/cubes/shared/data
usr/share/cubicweb/cubes/shared/wdoc