Remove Bad Symlink

This resolves the following issue when building Spreewald:

    WARNING:  See http://guides.rubygems.org/specification-reference/ for help
    ERROR:  While executing gem ... (Gem::InvalidSpecificationException)
        ["tests/rails-3.2/capybara-2/log"] are not files

Supposing that this directory is supposed to exist I can amend this pull request accordingly.