pgsql: Revert "Fix search_path to a safe value during maintenance opera

Revert "Fix search_path to a safe value during maintenance operations."

This reverts commit 05e17373517114167d002494e004fa0aa32d1fd1.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/2fcc7ee7affe2fb708d7b2727e93981216b5d2f8

Modified Files
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contrib/amcheck/verify_nbtree.c | 2 --
src/backend/access/brin/brin.c | 2 --
src/backend/catalog/index.c | 8 --------
src/backend/commands/analyze.c | 2 --
src/backend/commands/cluster.c | 2 --
src/backend/commands/indexcmds.c | 6 ------
src/backend/commands/matview.c | 2 --
src/backend/commands/vacuum.c | 2 --
src/bin/scripts/t/100_vacuumdb.pl | 4 ++++
src/include/utils/guc.h | 6 ------
src/test/modules/test_oat_hooks/expected/test_oat_hooks.out | 4 ----
src/test/regress/expected/privileges.out | 12 ++++++------
src/test/regress/expected/vacuum.out | 2 +-
src/test/regress/sql/privileges.sql | 8 ++++----
src/test/regress/sql/vacuum.sql | 2 +-
15 files changed, 16 insertions(+), 48 deletions(-)