src/cyw43_ll: Remove support for auth_type=-1 to automatically set auth.

The caller of cyw43_wifi_join() (which calls cyw43_ll_wifi_join) should be
responsible for selecting the desired auth type.  Otherwise the event logic
in cyw43_wifi_join() will not work.

Signed-off-by: Damien George <dpgeorge@georgerobotics.com.au>

src/cyw43_ll.c

@@ -2042,18 +2042,6 @@ int cyw43_ll_wifi_join(cyw43_ll_t *self_in, size_t ssid_len, const uint8_t *ssid
 
     cyw43_write_iovar_u32(self, "ampdu_ba_wsize", 8, WWD_STA_INTERFACE);
 
-    // Set the wireless security type
-    if (auth_type == (uint32_t)-1) {
-        // Auto auth type
-        if (key == NULL || key_len == 0) {
-            // No key given, assume this means open security
-            auth_type = CYW43_AUTH_OPEN;
-        } else {
-            // See WICED_SECURITY_WPA2_MIXED_PSK
-            auth_type = CYW43_AUTH_WPA2_MIXED_PSK;
-        }
-    }
-
     uint32_t wpa_auth = 0;
     if (auth_type == CYW43_AUTH_OPEN) {
         wpa_auth = 0;