What command is used to remove the currently configured system proxy?

The command used to remove the currently configured system proxy is "netsh winhttp reset proxy." This command is a part of the Windows networking tools and specifically targets the WinHTTP settings, which are designed for applications that use the WinHTTP application programming interface.

By executing this command, the system will reset the proxy configuration for WinHTTP to its default state, effectively removing any proxy settings that were previously in effect. This is particularly useful when troubleshooting network connectivity issues related to proxy configurations or when switching between environments that require different proxy settings.

The other choices do not correspond to actual commands or recognized functions within the context of Windows networking. For instance, "remove-proxy" and "clear proxy settings" do not exist as commands in Windows; they may sound intuitive but are not part of the command-line interface. Similarly, "net config proxy" is not a valid command, as it does not align with the command patterns and functionalities provided by the Windows networking tools.