try to fix graft prune test

Author: Zoran Cvetkov

store/postgres/src/relational/prune.rs

@@ -252,12 +252,13 @@ impl TablePair {
                   "src" => src_nsp.as_str(), "error" => e.to_string());
         }
 
+        // TODO: check if this is needed
         // Make sure the vid sequence
         // continues from where it was
-        writeln!(
-            query,
-            "select setval('{dst_nsp}.{vid_seq}', nextval('{src_nsp}.{vid_seq}'));"
-        )?;
+        // writeln!(
+        //     query,
+        //     "select setval('{dst_nsp}.{vid_seq}', nextval('{src_nsp}.{vid_seq}'));"
+        // )?;
 
         writeln!(query, "drop table {src_qname};")?;
         writeln!(query, "alter table {dst_qname} set schema {src_nsp}")?;