Removes unused imports
Reverts the remove
Fixes the license

The license MIT is a template and needs an additional + file LICENSE
in the description. The file then contains two variables that will
be filled in the template. YEAR and COPYRIGHT HOLDER.
Removes thestthat

Just for now as long as the tests are not fixed because every
include in description needs to be used in the package otherwise
it will give you a note on checking the package.