Remove obsolete version printing in atmsort.pm

We haven't used CVS, with its Revision tags, for a very long time.

src/test/regress/atmsort.pm

@@ -1113,20 +1113,8 @@ sub atmsort_bigloop
     my $big_ignore = 0;
     my $define_match_expression = undef;
     my $error_detail_exttab_trifecta_skip = 0; # don't ask!
-    my $verzion = "unknown";
 
-    if (q$Revision$ =~ /\d+/)
-    {
-        $verzion = do { my @r = (q$Revision$ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; # must be all one line, for MakeMaker
-    }
-        my $format_fix = << "EOF_formatfix";
-                                ))}
-EOF_formatfix
-    # NOTE: define $format_fix with HERE document just to fix emacs
-    # indenting due to comment char in Q expression...
-
-    $verzion = $0 . " version " . $verzion;
-    print $atmsort_outfh "GP_IGNORE: formatted by $verzion\n";
+    print $atmsort_outfh "GP_IGNORE: formatted by atmsort.pm\n";
 
     my $do_equiv = $glob_compare_equiv || $glob_make_equiv_expected;