compat: remove unnecessary diamond-shaped multiple inheritance

mercurial/hgweb/server.py

@@ -35,7 +35,7 b' class _error_logger(object):'
         for msg in seq:
             self.handler.log_error("HG error:  %s", msg)
 
-class _hgwebhandler(object, BaseHTTPServer.BaseHTTPRequestHandler):
+class _hgwebhandler(BaseHTTPServer.BaseHTTPRequestHandler):
 
     url_scheme = 'http'