pgsql: Do not throw errors inside the callback-backend, they get lost.

lib/modules/Sql.pmod/pgsql_util.pmod

@@ -1346,7 +1346,6 @@ class sql_result {
         break;
       callout(callback, 0, this, datarow, @args);
     }
-    trydelayederror();
     eoffound = 1;
     callout(callback, 0, this, 0, @args);
   }
@@ -1376,7 +1375,6 @@ class sql_result {
         break;
       callout(callback, 0, this, datarow, @args);
     }
-    trydelayederror();
     eoffound = 1;
     if (sizeof(datarow)>1)
       callout(callback, 0, this, datarow = datarow[..<1], @args);