Remove force_unicode

jedi/api/file_name.py

@@ -1,6 +1,5 @@
 import os
 
-from jedi._compatibility import force_unicode
 from jedi.api import classes
 from jedi.api.strings import StringName, get_quote_ending
 from jedi.api.helpers import match
@@ -94,7 +93,7 @@ def _add_strings(context, nodes, add_slash=False):
             return None
         if not first and add_slash:
             string += os.path.sep
-        string += force_unicode(s)
+        string += s
         first = False
     return string