lib/PublicInbox/Git.pm   | 20 +++++---------------
 lib/PublicInbox/Inbox.pm |  5 ++---
 t/git.t                  |  3 +--

diff --git a/lib/PublicInbox/Git.pm b/lib/PublicInbox/Git.pm
index a4daaa48f0914f538e1232b66267384a2dafec0d..9a38d7c8dce83bc0aa13d0ee870ab33924390580 100644
--- a/lib/PublicInbox/Git.pm
+++ b/lib/PublicInbox/Git.pm
@@ -211,19 +211,9 @@ 	($hex, $type, $size);
 }
 
 sub _destroy {
-	my ($self, $in, $out, $pid, $expire) = @_;
-	my $rfh = $self->{$in} or return;
-	if (defined $expire) {
-		# at least FreeBSD 11.2 and Linux 4.20 update mtime of the
-		# read end of a pipe when the pipe is written to; dunno
-		# about other OSes.
-		my $mtime = (stat($rfh))[9];
-		return if $mtime > $expire;
-	}
+	my ($self, $in, $out, $pid) = @_;
 	my $p = delete $self->{$pid} or return;
-	foreach my $f ($in, $out) {
-		delete $self->{$f};
-	}
+	delete @$self{($in, $out)};
 	waitpid $p, 0;
 }
 
@@ -251,9 +241,9 @@ }
 
 # returns true if there are pending "git cat-file" processes
 sub cleanup {
-	my ($self, $expire) = @_;
-	_destroy($self, qw(in out pid), $expire);
-	_destroy($self, qw(in_c out_c pid_c), $expire);
+	my ($self) = @_;
+	_destroy($self, qw(in out pid));
+	_destroy($self, qw(in_c out_c pid_c));
 	!!($self->{pid} || $self->{pid_c});
 }
 
diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index 2771a241aa5361f3067ef15f22a1463c4d6b75dc..b3178b987a7a031dc96d134fa7be13423fda1866 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -32,13 +32,12 @@ 				delete $ibx->{$f};
 				# refcnt is zero when tmp is out-of-scope
 			}
 		}
-		my $expire = time - 60;
 		if (my $git = $ibx->{git}) {
-			$again = $git->cleanup($expire);
+			$again = $git->cleanup;
 		}
 		if (my $gits = $ibx->{-repo_objs}) {
 			foreach my $git (@$gits) {
-				$again = 1 if $git->cleanup($expire);
+				$again = 1 if $git->cleanup;
 			}
 		}
 		if ($have_devel_peek) {
diff --git a/t/git.t b/t/git.t
index 7edf82b44a6dd124cee85e89a1a5f219313a85dc..913f6e5e8928850e8f4c0ce1c2830db4200e0127 100644
--- a/t/git.t
+++ b/t/git.t
@@ -143,8 +143,7 @@ 	open $fh, '<', "$alt/config" or die "open failed: $!\n";
 	my $config = eval { local $/; <$fh> };
 	is($$found, $config, 'alternates reloaded');
 
-	ok($gcf->cleanup(time - 30), 'cleanup did not expire');
-	ok(!$gcf->cleanup(time + 30), 'cleanup can expire');
+	ok(!$gcf->cleanup, 'cleanup can expire');
 	ok(!$gcf->cleanup, 'cleanup idempotent');
 
 	my $t = $gcf->modified;