Revert "Add ignorable div test"

This reverts commit 0a5808a303e4c935a2469db4be90be7a6ce75b6c.
Revert "Add examples for ignoring"

This reverts commit 956a97307f727fab40f700cfca77e5cd5a59c73d.
Revert "Remove ignored elements from the document"

This reverts commit f374b667322e87819b5fbf8ca6f0d4c97605fa08.
Revert "Document with an ignored favicon should fail"

This reverts commit 7d613d43d53cd2dce294ee04b7f285ac5b45bcc6.