hgweb: rely on open_template()'s fallback to using templatedir()

Differential Revision: https://phab.mercurial-scm.org/D8900

mercurial/hgweb/hgweb_mod.py

@@ -65,10 +65,6 b' def _stylemap(styles, path=None):'
     3. templatepath/map
     """
 
-    if path is None:
-        path = templater.templatedir()
-
-    if path is not None:
         for style in styles:
             # only plain name is allowed to honor template paths
             if (