Also remove left-to-right marks when parsing a HTML link.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@960417 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor: remove dead code.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@960421 b8457f37-d9ea-0310-8a92-e5e31aec5664