pgsql: doc: remove PG version mention in EXPLAIN output

doc: remove PG version mention in EXPLAIN output

Reported-by: Daniel Westermann

Discussion: /messages/by-id/GV0P278MB0419DF1A8673E8D17A6287FAD2FA9@GV0P278MB0419.CHEP278.PROD.OUTLOOK.COM

Backpatch-through: master

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/0cfc231aa19d80b31e37422a968d51fa8bcb53a9

Modified Files
--------------
doc/src/sgml/planstats.sgml | 2 --
1 file changed, 2 deletions(-)