[FEM] remove checks for Python 2

src/Mod/Fem/femtools/femutils.py

@@ -378,16 +378,8 @@ def get_refshape_type(fem_doc_object):
 
 
 def pydecode(bytestring):
-    """ Return *bytestring* as a unicode string for python 2 and 3.
-
-    For python 2 *bytestring* is converted to a string of type ``unicode``. For
-    python 3 it is returned as is because it uses unicode for it's ``str`` type
-    already.
-    """
-    if sys.version_info.major < 3:
-        return bytestring
-    else:
-        return bytestring.decode("utf-8")
+    """ Return *bytestring* as a unicode string """
+    return bytestring.decode("utf-8")
 
 
 def startProgramInfo(code):