export: remove useless comparison between file object and string

It was introduced at 31aa2e5b0750, where "template" argument could be a file
object. After that, a306837f8c87 added "len(template)", so "template" must be
a string now. Therefore, "fp != template" should always be True.

It seems 31aa2e5b0750 was intended to work around a bug in TortoiseHg, and
I'm sure I've fixed it completely in TortoiseHg source.

https://selenic.com/pipermail/mercurial-devel/2011-February/028467.html

mercurial/cmdutil.py

@@ -1054,8 +1054,7 b" def export(repo, revs, template='hg-%h.p"
             fp = makefileobj(repo, template, node, desc=desc, total=total,
                              seqno=seqno, revwidth=revwidth, mode='wb',
                              modemap=filemode)
-            if fp != template:
-                shouldclose = True
+            shouldclose = True
         if fp and not getattr(fp, 'name', '<unnamed>').startswith('<'):
             repo.ui.note("%s\n" % fp.name)