Merge wpiformat configs (#8365)

After replacing the remaining include guards with `#pragma once`, I was
able to merge all the wpiformat configs into one file in the repo root.
This should make the config easier to reason about and maintain in the
future.

wpinet/src/main/native/include/wpi/net/HttpWebSocketServerConnection.hpp

@@ -2,8 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#ifndef WPINET_WPINET_SRC_MAIN_NATIVE_INCLUDE_WPI_NET_HTTPWEBSOCKETSERVERCONNECTION_HPP_
-#define WPINET_WPINET_SRC_MAIN_NATIVE_INCLUDE_WPI_NET_HTTPWEBSOCKETSERVERCONNECTION_HPP_
+#pragma once
 
 #include <initializer_list>
 #include <memory>
@@ -122,5 +121,3 @@ class HttpWebSocketServerConnection
 };
 
 }  // namespace wpi::net
-
-#endif  // WPINET_WPINET_SRC_MAIN_NATIVE_INCLUDE_WPI_NET_HTTPWEBSOCKETSERVERCONNECTION_HPP_