Remove automatic generated property columns

The columns could only be text, since a typed column makes Cypher writes
fail on values of another type. Leave typed columns and views to the
database administrator instead, and document how to set them up.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/smoke_test.py

@@ -4,13 +4,9 @@
 
 Usage: python tests/smoke_test.py [bolt-uri] [user] [password]
 Requires: pip install neo4j
-Set PEO_SMOKE_PG_DSN (e.g. "host=localhost dbname=postgres") to also check the
-generated property columns over SQL; that needs psycopg.
 """
 
-import os
 import sys
-import time
 
 import neo4j
 from neo4j.graph import Node, Path, Relationship
@@ -121,22 +117,6 @@ MATCH ()-[]->() RETURN { name:'relationships', data: count(*)} AS result
 
         check("managed write transaction", s.execute_write(work) == 1)
 
-    dsn = os.environ.get("PEO_SMOKE_PG_DSN")
-    if dsn:
-        import psycopg
-
-        with psycopg.connect(dsn, user=user, password=password, autocommit=True) as pg:
-            query = f'SELECT name, age FROM "{GRAPH}"."Person" ORDER BY name'
-            for _ in range(30):
-                try:
-                    rows = pg.execute(query).fetchall()
-                    break
-                except psycopg.errors.UndefinedColumn:
-                    time.sleep(0.5)
-            else:
-                rows = None
-            check("generated property columns", rows == [("Ann", "30"), ("Bob's", None)])
-
     with driver.session(database="system") as s:
         s.run(f"DROP DATABASE {GRAPH}").consume()