express: drop Python 2 fallbacks

src/ifcopenshell-python/ifcopenshell/express/codegen.py

@@ -18,6 +18,7 @@
 
 import itertools
 import functools
+from pathlib import Path
 
 
 def indent(n, s):
@@ -36,15 +37,4 @@ class Base:
     """
 
     def emit(self):
-        import platform
-
-        if tuple(map(int, platform.python_version_tuple())) < (2, 8):
-            from io import open as unicode_open
-
-            unicode_type = unicode
-        else:
-            unicode_open = open
-            unicode_type = lambda x, *args, **kwargs: x
-        f = unicode_open(self.file_name, "w", encoding="utf-8")
-        f.write(unicode_type(repr(self), encoding="utf-8", errors="ignore"))
-        f.close()
+        Path(self.file_name).write_text(repr(self), encoding="utf-8")