`REXML::QuickPath` should be deprecated or removed

[naitoh]

REXML::QuickPath should be deprecated or removed as it has no test code and does not appear to be used.

I searched for QuickPath on GitHub, but all I found was documentation.

https://github.com/search?q=QuickPath.first&type=code
https://github.com/search?q=QuickPath.each&type=code
https://github.com/search?q=QuickPath.match&type=code
https://github.com/search?q=QuickPath.filter&type=code
https://github.com/search?q=QuickPath.axe&type=code
https://github.com/search?q=QuickPath.predicate&type=code
https://github.com/search?q=QuickPath.attribute&type=code
https://github.com/search?q=QuickPath.name&type=code
https://github.com/search?q=QuickPath.method_missing&type=code
https://github.com/search?q=QuickPath.function&type=code
https://github.com/search?q=QuickPath.parse_args&type=code