Revert "Use binary variant of breeze"

This reverts commit e06c325a9a29f870e8997732d5a8ba27b473c3f8.

The performance was worse because it now knew about more
icons, had to load the 18MB file and searched more fallbacks.
It's better if we either get the gtk caches to work or
improve the index.theme so that not so many directories are
searched.