qcacmn: Remove wmi_unified_vdev_restart_send() prototype

Currently wmi_unified_api defines a wmi_unified_vdev_restart_send()
prototype, but there is no implementation of this function. This
discrepancy dates back to the initial introduction of the prototype in
change "qcacmn: Add tlv implementation of common unified API" (Change
Id I7e70b48ef5e1df0c0f81c639579e6eb1a6685dc3). Since this function
does not exist, and in fact has never existed, remove the prototype.

Note that another API, wmi_unified_vdev_start_send(), supports both
start and restart capability.

Change-Id: Ia88d8b1e825c806b454428e72d9731ccefd05c01
CRs-Fixed: 2286613
diff --git a/wmi/inc/wmi_unified_api.h b/wmi/inc/wmi_unified_api.h
index c524609..cc0d04f 100644
--- a/wmi/inc/wmi_unified_api.h
+++ b/wmi/inc/wmi_unified_api.h
@@ -408,10 +408,6 @@
 QDF_STATUS wmi_unified_vdev_delete_send(void *wmi_hdl,
 					  uint8_t if_id);
 
-QDF_STATUS wmi_unified_vdev_restart_send(void *wmi_hdl,
-				uint8_t macaddr[IEEE80211_ADDR_LEN],
-				struct vdev_start_params *param);
-
 QDF_STATUS wmi_unified_vdev_stop_send(void *wmi_hdl,
 					uint8_t vdev_id);