Revert "Temporary patch to help debug pg_walsummary test failures."

Thanks to commits ea18eb7, b6ee30e, and 19a829a, the
002_blocks.pl test now consistently passes, so we can remove this
temporary debugging code.

This reverts commit 5ddf997.

Discussion: https://postgr.es/m/20240314210010.GA3056455%40nathanxps13

Author: nathan-bossart

src/backend/backup/walsummary.c

@@ -252,15 +252,8 @@ RemoveWalSummaryIfOlderThan(WalSummaryFile *ws, time_t cutoff_time)
 		ereport(ERROR,
 				(errcode_for_file_access(),
 				 errmsg("could not stat file \"%s\": %m", path)));
-	/* XXX temporarily changed to debug buildfarm failures */
-#if 0
 	ereport(DEBUG2,
 			(errmsg_internal("removing file \"%s\"", path)));
-#else
-	ereport(LOG,
-			(errmsg_internal("removing file \"%s\" cutoff_time=%llu", path,
-							 (unsigned long long) cutoff_time)));
-#endif
 }
 
 /*

src/bin/pg_walsummary/t/002_blocks.pl

@@ -51,7 +51,6 @@
 SELECT MAX(end_lsn) AS summarized_lsn FROM pg_available_wal_summaries()
 EOM
 note("after insert, summarized through $summarized_lsn");
-note_wal_summary_dir("after insert", $node1);
 
 # Update a row in the first block of the table and trigger a checkpoint.
 $node1->safe_psql('postgres', <<EOM);
@@ -78,15 +77,13 @@
 is(0+@lines, 1, "got exactly one new WAL summary");
 my ($tli, $start_lsn, $end_lsn) = split(/\|/, $lines[0]);
 note("examining summary for TLI $tli from $start_lsn to $end_lsn");
-note_wal_summary_dir("after new summary", $node1);
 
 # Reconstruct the full pathname for the WAL summary file.
 my $filename = sprintf "%s/pg_wal/summaries/%08s%08s%08s%08s%08s.summary",
 					   $node1->data_dir, $tli,
 					   split(m@/@, $start_lsn),
 					   split(m@/@, $end_lsn);
 ok(-f $filename, "WAL summary file exists");
-note_wal_summary_dir("after existence check", $node1);
 
 # Run pg_walsummary on it. We expect exactly two blocks to be modified,
 # block 0 and one other.
@@ -96,16 +93,5 @@
 like($stdout, qr/FORK main: block 0$/m, "stdout shows block 0 modified");
 is($stderr, '', 'stderr is empty');
 is(0+@lines, 2, "UPDATE modified 2 blocks");
-note_wal_summary_dir("after pg_walsummary run", $node1);
 
 done_testing();
-
-# XXX. Temporary debugging code.
-sub note_wal_summary_dir
-{
-	my ($flair, $node) = @_;
-
-	my $wsdir = sprintf "%s/pg_wal/summaries", $node->data_dir;
-	my @wsfiles = grep { $_ ne '.' && $_ ne '..' } slurp_dir($wsdir);
-	note("$flair pg_wal/summaries has: @wsfiles");
-}