hgweb: drop unused argument 'tmpl' from webutil.compare()

mercurial/hgweb/webcommands.py

@@ -886,7 +886,7 b' def comparison(web):'
         pfctx = ctx.parents()[0][path]
         leftlines = filelines(pfctx)
 
-    comparison = webutil.compare(web.tmpl, context, leftlines, rightlines)
+    comparison = webutil.compare(context, leftlines, rightlines)
     if fctx is not None:
         rename = webutil.renamelink(fctx)
         ctx = fctx

mercurial/hgweb/webutil.py

@@ -633,7 +633,7 b' def _comparegen(context, contextnum, lef'
             l = _getcompblock(leftlines, rightlines, oc)
             yield {'lines': l}
 
-def compare(tmpl, contextnum, leftlines, rightlines):
+def compare(contextnum, leftlines, rightlines):
     args = (contextnum, leftlines, rightlines)
     return templateutil.mappinggenerator(_comparegen, args=args,
                                          name='comparisonblock')