pgsql: pg_resetwal: Update an obsolete comment

pg_resetwal: Update an obsolete comment

The comment claimed that pg_resetwal updates the pg_control file if it
is of an old version.  This has apparently never been true.  Also, in
c3c09be34b, another comment was added elsewhere that this currently
does not happen.  So this comment is wrong and redundant and can be
removed.

Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/0f3ab4a1-ae80-56e8-3426-6b4a02507687@eisentraut.org

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7273945cafa7a068ca2bcc617df1be1c7404de87

Modified Files
--------------
src/bin/pg_resetwal/pg_resetwal.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)