hgweb_mod: partially undo 8afc25e7effc to fix py3

We now bytes-ify the entire request, so this is wrong.

Differential Revision: https://phab.mercurial-scm.org/D2308

mercurial/hgweb/hgweb_mod.py

@@ -63,8 +63,6 archivespecs = util.sortdict((
 
 def getstyle(req, configfn, templatepath):
     fromreq = req.form.get('style', [None])[0]
-    if fromreq is not None:
-        fromreq = pycompat.sysbytes(fromreq)
     styles = (
         fromreq,
         configfn('web', 'style'),