The error is as NetWallah says, that you are checking to see if the filename equals "abc*.xml*" - not if the filename matches that pattern.

Personally I'd use Path::Class::Rule...

# untested!
use strict;
use warnings;
use Path::Class::Rule;

my $rule = Path::Class::Rule->new->file->name("abc*.xml*");

$_->remove for $rule->all("/tst");
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