wl12xx: remove unused firmware version macros

We don't use WL12XX_BA_SUPPORT_FW_COST_VER2_START nor
WL12XX_BA_SUPPORT_FW_COST_VER2_END anymore.
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/wl12xx.h

@@ -35,13 +35,6 @@
 #include "conf.h"
 #include "ini.h"
 
-/*
- * FW versions support BA 11n
- * versions marks x.x.x.50-60.x
- */
-#define WL12XX_BA_SUPPORT_FW_COST_VER2_START    50
-#define WL12XX_BA_SUPPORT_FW_COST_VER2_END      60
-
 #define WL127X_FW_NAME "ti-connectivity/wl127x-fw-3.bin"
 #define WL128X_FW_NAME "ti-connectivity/wl128x-fw-3.bin"