qcacld-3.0: Remove wma_register_roam_vdev_disc_event_handler()

A prototype for wma_register_roam_vdev_disc_event_handler() was added
by:
  qcacld-3.0: Process Disconnect request from FW
  Change-Id Ic1e83aace48a3e8424f23641b0e77c66f4283587

However, no actual function was added, so remove the prototype.

Change-Id: I4c6f41f93bb80f733031f4a77a94ee0b4cad6f1c
CRs-Fixed: 3434499

core/wma/inc/wma_internal.h

@@ -172,14 +172,6 @@ QDF_STATUS wma_set_ppsconfig(uint8_t vdev_id, uint16_t pps_param,
  */
 
 #ifdef WLAN_FEATURE_ROAM_OFFLOAD
-/**
- * wma_register_roam_vdev_disc_event_handler() - API to register handler for
- * roam vdev disconnect event id
- * @wma_handle: wma handle
- *
- * Return: void
- */
-void wma_register_roam_vdev_disc_event_handler(tp_wma_handle wma_handle);
 
 #ifdef WLAN_FEATURE_FIPS
 /**