Revert "Add type annotations" because of py3.4-incompatability
Revert "Add type annotations" because of py3.4-incompatability

This reverts commit d2b922f18c58fd379108e01316dfbde428a32f34.

agdsn/pycroft,lukasjuhrich/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,agdsn/pycroft,agdsn/pycroft,lukasjuhrich/pycroft