Revert "libipsec: Added Windows tun device support"

This reverts commit 77b91e6d0e.

src/libipsec/ipsec_processor.h

@@ -1,6 +1,5 @@
 /*
  * Copyright (C) 2012 Tobias Brunner
- * Copyright (C) 2020 Noel Kuntze
  *
  * Copyright (C) secunet Security Networks AG
  *
@@ -47,15 +46,6 @@ typedef void (*ipsec_inbound_cb_t)(void *data, ip_packet_t *packet);
  */
 typedef void (*ipsec_outbound_cb_t)(void *data, esp_packet_t *packet);
 
-
-/**
- * Callback called to raise acquire events.
- *
- * @param reqid			reqid of the matched IPsec policy
- * @param data			data supplied during registration of the callback
- */
-typedef void (*ipsec_acquire_cb_t)(uint32_t reqid, kernel_acquire_data_t *data);
-
 /**
  *  IPsec processor
  */
@@ -109,22 +99,6 @@ struct ipsec_processor_t {
 	void (*unregister_outbound)(ipsec_processor_t *this,
 								ipsec_outbound_cb_t cb);
 
-	/**
-	 * Register the callback used to raise an acquire event.
-	 *
-	 * @param cb			the callback function
-	 * @param data			optional data provided to the callback
-	 */
-	void (*register_acquire)(ipsec_processor_t *this, ipsec_acquire_cb_t cb,
-							 void *data);
-
-	/**
-	 * Unregister a previously registered acquire callback.
-	 *
-	 * @param cb			previously registered acquire callback
-	 */
-	void (*unregister_acquire)(ipsec_processor_t *this, ipsec_acquire_cb_t cb);
-
 	/**
 	 * Destroy an ipsec_processor_t.
 	 */