qcacld-3.0: Remove TDLS_STA_INDEX_VALID

Change I8ba344ce5593df44bd15527e2ff68e872b6d23b8 ("qcacld-3.0: TDLS:
remove legacy core functions") removed all uses of macro
TDLS_STA_INDEX_VALID. Since it is now unused, remove it.

Change-Id: Iefec2b4565f4a387778ccd5a4ed7e0d9eb9b732e
CRs-Fixed: 2375416

core/hdd/inc/wlan_hdd_assoc.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -37,8 +37,6 @@
 #ifdef FEATURE_WLAN_TDLS
 #define HDD_MAX_NUM_TDLS_STA          8
 #define HDD_MAX_NUM_TDLS_STA_P_UAPSD_OFFCHAN  1
-#define TDLS_STA_INDEX_VALID(staId) \
-	(((staId) >= 0) && ((staId) < 0xFF))
 #else
 #define HDD_MAX_NUM_TDLS_STA          0