ALTER TABLE users DROP COLUMN extra_json;
ALTER TABLE body DROP COLUMN extra_json;
ALTER TABLE contacts DROP COLUMN extra_json;
ALTER TABLE problem DROP COLUMN extra_json;
ALTER TABLE problem DROP COLUMN geocode_json;
ALTER TABLE comment DROP COLUMN extra_json;
ALTER TABLE moderation_original_data DROP COLUMN extra_json;
ALTER TABLE defect_types DROP COLUMN extra_json;
ALTER TABLE report_extra_fields DROP COLUMN extra_json;
ALTER TABLE roles DROP COLUMN extra_json;
ALTER TABLE token DROP COLUMN data_json;
