qcacld-3.0: Remove wlan_hdd_send_igmp_offload_params() stub

The stub function wlan_hdd_send_igmp_offload_params() was added by the
following patch:
    qcacld-3.0: Add support to offload igmp feature to fw
    Change-Id I05fbf23dc2836f8f5dc6e2f45b35bf2d30c39790

However there isn't a corresponding "real" function, nor is there a
caller. Since this was added in error, remove it.

Change-Id: I738a2be81e613138e13544f7335ad2876436a73b
CRs-Fixed: 3426018

core/hdd/src/wlan_hdd_power.c

@@ -325,13 +325,6 @@ hdd_send_igmp_offload_params(struct hdd_adapter *adapter,
 	return QDF_STATUS_SUCCESS;
 }
 
-static inline QDF_STATUS
-wlan_hdd_send_igmp_offload_params(struct hdd_adapter *adapter, bool enable,
-				  uint32_t *mc_address, uint32_t count)
-{
-	return QDF_STATUS_SUCCESS;
-}
-
 static inline void
 hdd_disable_igmp_offload(struct hdd_adapter *adapter)
 {}