Fixed remove_field for spatialite schema changes.

        else:

            super(SpatialiteSchemaEditor, self).add_field(model, field)

    def remove_field(self, model, field):

        from django.contrib.gis.db.models.fields import GeometryField

        # NOTE: If the field is a geometry field, the table is just recreated,

        # the parent's remove_field can't be used cause it will skip the

        # recreation if the field does not have a database type. Geometry fields

        # do not have a db type cause they are added and removed via stored

        # procedures.

        if isinstance(field, GeometryField):

            self._remake_table(model, delete_fields=[field])

        else:

            super(SpatialiteSchemaEditor, self).remove_field(model, field)

    def alter_db_table(self, model, old_db_table, new_db_table):

        from django.contrib.gis.db.models.fields import GeometryField

        # Remove geometry-ness from temp table