Doubled test for SET statements in pg_stat_statements tests

Hello!

I noticed that the same block

-- SET statements.
-- These use two different strings, still they count as one entry.
SET work_mem = '1MB';
Set work_mem = '1MB';
SET work_mem = '2MB';
RESET work_mem;
SET enable_seqscan = off;
SET enable_seqscan = on;
RESET enable_seqscan;

is checked twice in contrib/pg_stat_statements/sql/utility.sql on lines 278-286 and 333-341. Is this on any purpose? I think the second set of tests is not needed and can be removed, as in the attached patch.

regards, Sergei