Remove patches/ since they are for 1.x only.

https://github.com/ariya/phantomjs/issues/10448
Remove website/ directory.

The web site has been based on GitHub pages for 2.5 years already.
More tests for the arguments object.

https://github.com/ariya/phantomjs/issues/11845
https://github.com/ariya/phantomjs/issues/11558
https://github.com/ariya/phantomjs/issues/11746
https://github.com/ariya/phantomjs/issues/10315

https://github.com/ariya/phantomjs/issues/12439