doc: Drop stale note about extension LWLock names.
Oversight in commit 38b602b028.
Backpatch-through: 19
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/98cd8d509f8bc0aef4ea2aa5eb71085bece38b78
Modified Files
--------------
doc/src/sgml/monitoring.sgml | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)