universal7904: Disable wifi background scan

Unsupported by the our chipset
E wificond: NL80211_CMD_START_SCHED_SCAN failed: I/O error
E wificond: Failed to start pno scan

Change-Id: I12f3b786f2473ed0cf3197e50eb48dbd7c3c3b24
diff --git a/rro_overlays/WifiOverlay/res/values/config.xml b/rro_overlays/WifiOverlay/res/values/config.xml
index eeb5357..c4d8f92 100644
--- a/rro_overlays/WifiOverlay/res/values/config.xml
+++ b/rro_overlays/WifiOverlay/res/values/config.xml
@@ -21,9 +21,6 @@
          rmem_min,rmem_def,rmem_max,wmem_min,wmem_def,wmem_max -->
     <string name="config_wifi_tcp_buffers">524288,1048576,2097152,262144,524288,1048576</string>
 
-    <!-- Boolean indicating whether the wifi chipset has background scan support -->
-    <bool translatable="false" name="config_wifi_background_scan_support">true</bool>
-
     <!-- Indicates that AP mode MAC randomization is supported on this device -->
     <bool translatable="false" name="config_wifi_ap_mac_randomization_supported">false</bool>
 </resources>