Fixes a Perl bug making checksetup.pl fail 

Fix by David Denoncin

https://github.com/Perl/perl5/issues/17271
https://bugzilla.mozilla.org/show_bug.cgi?id=1588175

--- a/Bugzilla/Util.pm	2020-07-10 07:18:37.329165376 -0000
+++ b/Bugzilla/Util.pm	2020-07-10 07:18:55.869165262 -0000
@@ -106,7 +106,6 @@
     # |U+200e|Left-To-Right Mark        |0xe2 0x80 0x8e      |
     # |U+200f|Right-To-Left Mark        |0xe2 0x80 0x8f      |
     # --------------------------------------------------------
-    $var =~ tr/\x{202a}-\x{202e}//d;
   }
   return $var;
 }