Change Aerial VNF to use existing functions to process P5 messages

Remove fapi_vnf_p5.c and .h files as they're now unused

Move scheduler functions to fapi_nvIPC.c

openair1/SCHED_NR/fapi_nr_l1.c

@@ -29,9 +29,6 @@
  * \note
  * \warning
  */
-#ifdef ENABLE_AERIAL
-#include "nfapi/oai_integration/aerial/fapi_vnf_p5.h"
-#endif
 #include "fapi_nr_l1.h"
 #include "common/ran_context.h"
 #include "PHY/NR_TRANSPORT/nr_transport_proto.h"