remove explicit SerializableReadWrite option from DoTx (SerializableReadWrite is a default tx isolation level)

Author: asmyasnikov

table/table_e2e_test.go

@@ -425,11 +425,6 @@ func TestTable(t *testing.T) {
 			}
 			return res.Close()
 		},
-		table.WithTxSettings(
-			table.TxSettings(
-				table.WithSerializableReadWrite(),
-			),
-		),
 	); err != nil {
 		t.Fatalf("tx failed: %v\n", err)
 	}

table/table_regress_test.go

@@ -37,7 +37,7 @@ func TestIssue229UnexpectedNullWhileParseNilJsonDocumentValue(t *testing.T) {
 		var val issue229Struct
 		require.NoError(t, res.Scan(&val))
 		return nil
-	}, table.WithTxSettings(table.TxSettings(table.WithSerializableReadWrite())))
+	})
 	require.NoError(t, err)
 }