This patch drops the logic to detect if tlmgr is run in bootstrapping mode,
which assumes that tlmgr.pl is installed next to kpsewhich. However, we
(intentionally) hide it a bit so that users use apk to install texmf-dist
subpackages, rather than mixing distro provided and side-loaded packages.

--- a/texmf-dist/scripts/texlive/tlmgr.pl	2024-02-23 00:13:07.000000000 +0100
+++ b/texmf-dist/scripts/texlive/tlmgr.pl	2024-06-07 19:30:00.553109055 +0200
@@ -44,30 +44,7 @@ END {
 
 BEGIN {
   $^W = 1;
-  # make subprograms (including kpsewhich) have the right path:
-  my $kpsewhichname;
-  if ($^O =~ /^MSWin/i) {
-    # on w32 $0 and __FILE__ point directly to tlmgr.pl; they can be relative
-    $Master = __FILE__;
-    $Master =~ s!\\!/!g;
-    $Master =~ s![^/]*$!../../..!
-      unless ($Master =~ s!/texmf-dist/scripts/texlive/tlmgr\.pl$!!i);
-    $bindir = "$Master/bin/windows";
-    $kpsewhichname = "kpsewhich.exe";
-    # path already set by wrapper batchfile
-  } else {
-    $Master = __FILE__;
-    $Master =~ s,/*[^/]*$,,;
-    $bindir = $Master;
-    $Master = "$Master/../..";
-    # make subprograms (including kpsewhich) have the right path:
-    $ENV{"PATH"} = "$bindir:$ENV{PATH}";
-    $kpsewhichname = "kpsewhich";
-  }
-  if (-r "$bindir/$kpsewhichname") {
-    # not in bootstrapping mode => kpsewhich exists, so use it to get $Master
-    chomp($Master = `kpsewhich -var-value=TEXMFROOT`);
-  }
+  chomp($Master = `kpsewhich -var-value=TEXMFROOT`);
 
   # if we have no directory in which to find our modules,
   # no point in going on.