hgweb: simplify staticfile() now that we always pass it a single directory

I didn't realize this further simplifications enabled by D8786 until
now.

Differential Revision: https://phab.mercurial-scm.org/D8874

mercurial/hgweb/common.py

@@ -191,12 +191,7 b' def staticfile(directory, fname, res):'
         return
 
     fpath = os.path.join(*fname.split(b'/'))
-    if isinstance(directory, bytes):
-        directory = [directory]
-    for d in directory:
-        path = os.path.join(d, fpath)
-        if os.path.exists(path):
-            break
+    path = os.path.join(directory, fpath)
     try:
         os.stat(path)
         ct = pycompat.sysbytes(

mercurial/hgweb/hgwebdir_mod.py

@@ -416,7 +416,7 b' class hgwebdir(object):'
                 if not static:
                     tp = self.templatepath or templater.templatedir()
                     if tp is not None:
-                        static = [os.path.join(tp, b'static')]
+                        static = os.path.join(tp, b'static')
 
                 staticfile(static, fname, res)
                 return res.sendresponse()

mercurial/hgweb/webcommands.py

@@ -1320,7 +1320,7 b' def static(web):'
     static = web.config(b"web", b"static", untrusted=False)
     if not static:
         tp = web.templatepath or templater.templatedir()
-        static = [os.path.join(tp, b'static')]
+        static = os.path.join(tp, b'static')
 
     staticfile(static, fname, web.res)
     return web.res.sendresponse()