pgsql: Revert "Show index search count in EXPLAIN ANALYZE."

Revert "Show index search count in EXPLAIN ANALYZE."

This reverts commit 5ead85fbc81162ab1594f656b036a22e814f96b3.

This commit shows test failures with debug_parallel_query=regress. The
underlying issue needs to be debugged, so revert for now.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d00107cd63e780753aa25563fa37603369997d0c

Modified Files
--------------
contrib/bloom/blscan.c | 1 -
doc/src/sgml/bloom.sgml | 7 +-
doc/src/sgml/monitoring.sgml | 28 ++------
doc/src/sgml/perform.sgml | 60 ----------------
doc/src/sgml/ref/explain.sgml | 3 +-
doc/src/sgml/rules.sgml | 2 -
src/backend/access/brin/brin.c | 1 -
src/backend/access/gin/ginscan.c | 1 -
src/backend/access/gist/gistget.c | 2 -
src/backend/access/hash/hashsearch.c | 1 -
src/backend/access/index/genam.c | 1 -
src/backend/access/nbtree/nbtree.c | 15 ----
src/backend/access/nbtree/nbtsearch.c | 1 -
src/backend/access/spgist/spgscan.c | 1 -
src/backend/commands/explain.c | 40 -----------
src/include/access/relscan.h | 7 --
src/test/regress/expected/brin_multi.out | 27 +++----
src/test/regress/expected/memoize.out | 49 ++++---------
src/test/regress/expected/partition_prune.out | 100 ++++----------------------
src/test/regress/expected/select.out | 3 +-
src/test/regress/sql/memoize.sql | 5 +-
src/test/regress/sql/partition_prune.sql | 4 --
22 files changed, 49 insertions(+), 310 deletions(-)