pgsql: Remove an old comment that doesn't seem especially useful.

Remove an old comment that doesn't seem especially useful.

The functions that follow are concerned with various things, of
which the tar format is only one, so this comment doesn't really
seem helpful. The file isn't really divided into sections in the
way that this comment seems to contemplate -- or at least, not
any more.

Patch by me, reviewed by Michael Paquier.

Discussion: http://postgr.es/m/CA+TgmoZ_fFAoU6mrHt9QBs+dcYhN6yXenGTTMRebZNhtwPwHyg@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/f3948b5c9152e4beb33c0a4ff4ee193d264a5535

Modified Files
--------------
src/backend/backup/basebackup.c | 7 -------
1 file changed, 7 deletions(-)