pgsql: Revert "Stabilize test of BRIN parallel create"

Revert "Stabilize test of BRIN parallel create"

This reverts commit 4d916dd876c3. The goal of that commit was to
stabilize a test of parallel BRIN build, but using a TEMPORARY table
disables parallel index builds on that table, making the test useless.

Discussion: https://postgr.es/m/95d9cd43-5a92-407c-b7e4-54cd303630fe%40enterprisedb.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/a89cd7bfcdbb45a2c23b4b6004f4503f04f83bd7

Modified Files
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contrib/pageinspect/expected/brin.out | 2 +-
contrib/pageinspect/sql/brin.sql      | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)