No need to $proc.out.close anymore

Resolves issue #175. Reverts at least these commits:

* 96ccddc
* 39cde1e
* c63ed89

See this Perl 6 doc issue for more info:
Raku/doc#1304

Benchable.p6

@@ -76,7 +76,6 @@ multi method benchmark-code($full-commit-hash, @code) {
     }
     my $proc = run :out, :bin, ‘pzstd’, ‘-dqc’, ‘--’, “{ARCHIVES-LOCATION}/rakudo-moar/$full-commit-hash.zst”;
     run :in($proc.out), :bin, ‘tar’, ‘x’, ‘--absolute-names’;
-    $proc.out.close;
     my $timing;
     if “{BUILDS-LOCATION}/rakudo-moar/$full-commit-hash/bin/perl6”.IO !~~ :e {
         return ‘Commit exists, but a perl6 executable could not be built for it’

Coverable.p6

@@ -135,7 +135,6 @@ method process($msg, $config is copy, $grep is copy, $code is copy) {
         my $s = run 'sort', '--key=2,2', '--key=3n', '-u', :in($g.out), :out;
         my $colrm = run 'colrm', 1, 5, :in($s.out), :out;
         $result<coverage> = $colrm.out.slurp-rest.chomp;
-        $colrm.out.close;
         $output = $result<output>;
         if $result<signal> < 0 { # numbers less than zero indicate other weird failures
             $output = “Cannot test this commit ($output)”
@@ -176,7 +175,6 @@ method process($msg, $config is copy, $grep is copy, $code is copy) {
                 # ⚠ TODO don't do this ↓ for every line, do it for every *file*. It will be much faster.
                 my $proc = run :out, |@git, ‘show’, “$full-commit:$fname”;
                 my $code = run(:out, :in($proc.out), ‘sed’, ‘-n’, $sed-range).out.slurp-rest.trim; # TODO trim? or just chomp?
-                $proc.out.close;
                 $code .= subst(:g, “\n”, ‘```<br>```’); # TODO multiline code blocks using github markdown?
                 $code .= subst(:g, ‘|’, ‘\|’); # TODO really?
                 $cover-report ~= “ ```$code``` |\n”; # TODO close properly (see how many ``` are there already)

Whateverable.pm6

@@ -234,11 +234,9 @@ method run-smth($full-commit-hash, $code, :$backend=‘rakudo-moar’) {
     if $archive-path.IO ~~ :e {
         my $proc = run :out, :bin, ‘pzstd’, ‘-dqc’, ‘--’, $archive-path;
         run :in($proc.out), :bin, ‘tar’, ‘x’, ‘--absolute-names’;
-        $proc.out.close();
     } else {
         my $proc = run :out, :bin, ‘lrzip’, ‘-dqo’, ‘-’, ‘--’, $archive-link;
         run :in($proc.out), :bin, ‘tar’, ‘--extract’, ‘--absolute-names’, ‘--’, $build-path;
-        $proc.out.close();
     }
 
     my $return = $code($build-path); # basically, we wrap around $code

build.p6

@@ -184,7 +184,6 @@ sub process-commit($commit) {
     say “»»»»» $commit: compressing”;
     my $proc = run(:out, :bin, ‘tar’, ‘cf’, ‘-’, ‘--absolute-names’, ‘--remove-files’, ‘--’, $build-path);
     run(:in($proc.out), :bin, ‘zstd’, ‘-c’, ‘-19’, ‘-q’, ‘-o’, $archive-path);
-    $proc.out.close;
 
     rmtree $temp-folder;
 }

maintenance/long-term-storage.p6

@@ -64,7 +64,6 @@ sub pack-it {
         #      once in forever.
         my $proc = run :out, :bin, ‘pzstd’, ‘-dqc’, ‘--’, $archive-path;
         exit 1 unless run :in($proc.out), :bin, ‘tar’, ‘x’, ‘--absolute-names’;
-        $proc.out.close;
     }
 
     my @bytes = @pack.join.comb(2)».parse-base: 16;
@@ -77,7 +76,6 @@ sub pack-it {
 
     my $proc = run :out, :bin, ‘tar’, ‘cf’, ‘-’, ‘--absolute-names’, ‘--remove-files’, ‘--’, |@paths;
     if run :in($proc.out), :bin, ‘lrzip’, ‘-q’, ‘-L’, ‘9’, ‘-o’, $large-archive-path {
-        $proc.out.close;
         for @pack {
             $large-archive-path.IO.symlink(“{ARCHIVES-LOCATION}/$_”);
             unlink “{ARCHIVES-LOCATION}/$_.zst”