Drop support for Python 2.

src/ifcopenshell-python/ifcopenshell/geom/main.py

@@ -17,11 +17,6 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import annotations
-
 import os
 import sys
 import operator