Revert "pg_resetwal: Improve error with wrong/missing data directory"
This reverts commit
1d863c250461410e60c9ed5d3180f32336f4c3e2.
This broke specifying the data directory as a relative path.
Reported-by: Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>
Discussion: https://www.postgresql.org/message-id/flat/TYAPR01MB58664AD301F511B1EA5B72B4F5C0A%40TYAPR01MB5866.jpnprd01.prod.outlook.com