bundlerepo: remove old style check of file names

The old check is no longer needed:

The checked paths will be passed on to filelog.__init__ which will prefix the
path with 'data/'. A leading '/' will thus not do any harm.

And: The paths will be used by an opener which will use a pathauditor.

And finally: The old check did not consider Windows paths and was thus
insufficient.

mercurial/bundlerepo.py

@@ -255,8 +255,6 b' class bundlerepository(localrepo.localre'
                     if not c:
                         break
 
-        if f[0] == '/':
-            f = f[1:]
         if f in self.bundlefilespos:
             self.bundle.seek(self.bundlefilespos[f])
             return bundlefilelog(self.sopener, f, self.bundle,