qcacld-3.0: Remove obsolete hdd_green_ap_update_config() stub

Previously change I2cfee273ffbcefcd3294cc1a18fb58549166c55b
("qcacld-3.0: Green ap CFG convergence") removed the implementation of
hdd_green_ap_update_config(), but it failed to remove the inline stub
implementation for use when WLAN_SUPPORT_GREEN_AP was not enabled, so
remove it now.

Change-Id: I08bee34b1a42de0147c0e3701162b70ff5a21f21
CRs-Fixed: 2363214

core/hdd/src/wlan_hdd_green_ap.h

@@ -85,12 +85,6 @@ int hdd_green_ap_enable_egap(struct hdd_context *hdd_ctx)
 	return 0;
 }
 
-static inline
-int hdd_green_ap_update_config(struct hdd_context *hdd_ctx)
-{
-	return 0;
-}
-
 static inline
 int hdd_green_ap_start_state_mc(struct hdd_context *hdd_ctx,
 				enum QDF_OPMODE mode, bool is_session_start)