Deleting tests/ironruby/specs/library

I am planning on deleting tests/ironruby/specs/library in order to keep
the tests (Socket in this case) in the RubySpec directory tree we have
(tests/ironruby/specs/ruby/1.8/library). I wanted to give a heads up
before I did it so that people didn’t try to add tests and then redo
them after the delete.

JD