[IMP] pg: tiny simplification

When using a `Cursor` in a `with` statement, it will be committed
automatically. No need to do it explicitly and no need to save the rowcount in
a local var.

closes #279

Signed-off-by: Christophe Simonis (chs) <chs@odoo.com>

Author: cawo-odoo

src/util/pg.py

@@ -111,9 +111,7 @@ def _parallel_execute_threaded(cr, queries, logger=_logger):
         def execute(query):
             with cursor() as tcr:
                 tcr.execute(query)
-                cnt = tcr.rowcount
-                tcr.commit()
-                return cnt
+                return tcr.rowcount
 
         cr.commit()