Update schema.rb file for PostgreSQL
Update schema.rb file for PostgreSQL

This removes the limits from integer and text columns as these make no
sense when using PostgreSQL.

StatesOfJersey/e-petitions,joelanman/e-petitions,joelanman/e-petitions,telekomatrix/e-petitions,ansonK/e-petitions,telekomatrix/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,joelanman/e-petitions,StatesOfJersey/e-petitions,StatesOfJersey/e-petitions,alphagov/e-petitions,ansonK/e-petitions,unboxed/e-petitions,unboxed/e-petitions,telekomatrix/e-petitions,unboxed/e-petitions,oskarpearson/e-petitions,StatesOfJersey/e-petitions,alphagov/e-petitions,unboxed/e-petitions,alphagov/e-petitions,ansonK/e-petitions,oskarpearson/e-petitions