Remove unnecessary validate_backup_version

Author: za-arthur

src/validate.c

@@ -19,8 +19,6 @@ static void *pgBackupValidateFiles(void *arg);
 static void do_validate_instance(void);
 
 static bool corrupted_backup_found = false;
-/* Program version of a current backup */
-static uint32 validate_backup_version = 0;
 
 typedef struct
 {
@@ -220,7 +218,7 @@ pgBackupValidateFiles(void *arg)
 		 * To avoid this problem we need to use different algorithm, CRC-32 in
 		 * this case.
 		 */
-		crc = pgFileGetCRC(file->path, validate_backup_version <= 20021);
+		crc = pgFileGetCRC(file->path, arguments->backup_version <= 20021);
 		if (crc != file->crc)
 		{
 			elog(WARNING, "Invalid CRC of backup file \"%s\" : %X. Expected %X",