Drop e2fsprogs scratch build workaround

Drop the e2fsprogs scratch build workaround we were using for
https://github.com/fedora-silverblue/issue-tracker/issues/470 -
with the new 'use a custom ref and rebase to the official ref'
thing I implemented for update ostree tests, it shouldn't be
necessary any longer.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

lib/utils.pm

@@ -474,7 +474,7 @@ sub setup_workaround_repo {
     my %workarounds = (
         "37" => [],
         "38" => [],
-        "39" => ["101544183"],
+        "39" => [],
     );
     # then we'll download each update for our release:
     my $advortasks = $workarounds{$version};