upgrade.rb in httpx-1.1.3

- old
+ new

@@ -44,10 +44,9 @@
 
             return response unless protocol_handler
 
             log { "upgrading to #{upgrade_protocol}..." }
             connection = find_connection(request, connections, options)
-            connections << connection unless connections.include?(connection)
 
             # do not upgrade already upgraded connections
             return if connection.upgrade_protocol == upgrade_protocol
 
             protocol_handler.call(connection, request, response)