Removed check for python version

ebook_converter/utils/filenames.py

@@ -10,7 +10,7 @@ from math import ceil
 
 from ebook_converter import force_unicode, isbytestring, prints, sanitize_file_name
 from ebook_converter.constants import (
-    filesystem_encoding, iswindows, plugins, preferred_encoding, isosx, ispy3
+    filesystem_encoding, iswindows, plugins, preferred_encoding, isosx
 )
 from ebook_converter.utils.localization import get_udc
 
@@ -624,16 +624,3 @@ def copytree_using_links(path, dest, dest_is_parent=True, filecopyfunc=copyfile)
                 hardlink(src, df)
             except Exception:
                 filecopyfunc(src, df)
-
-
-if not ispy3 and not iswindows:
-    # On POSIX in python2 if you pass a unicode path to rmtree
-    # it tries to decode all filenames it encounters while walking
-    # the tree which leads to unicode errors on Linux where there
-    # can be non-decodeable filenames.
-    def rmtree(x, **kw):
-        if not isinstance(x, bytes):
-            x = x.encode('utf-8')
-        return shutil.rmtree(x, **kw)
-else:
-    rmtree = shutil.rmtree