Revert "more login hacking"

This reverts commit 47d2b49.

This has now been superceded on develop by PR 9472.

synapse/http/site.py

@@ -333,28 +333,14 @@ def _should_log_request(self) -> bool:
 
 
 class XForwardedForRequest(SynapseRequest):
+    def __init__(self, *args, **kw):
+        SynapseRequest.__init__(self, *args, **kw)
+
     """
     Add a layer on top of another request that only uses the value of an
     X-Forwarded-For header as the result of C{getClientIP}.
-
-    XXX: I think the right way to do this is with request.setHost().
     """
 
-    def __init__(self, *args, **kw):
-        SynapseRequest.__init__(self, *args, **kw)
-
-        forwarded_header = self.getHeader(b"x-forwarded-proto")
-        if forwarded_header is not None:
-            self._is_secure = forwarded_header.lower() == b"https"
-        else:
-            logger.warning(
-                "received request lacks an x-forwarded-proto header: assuming https"
-            )
-            self._is_secure = True
-
-    def isSecure(self):
-        return self._is_secure
-
     def getClientIP(self):
         """
         @return: The client address (the first address) in the value of the