Revert "Add capabilities for wifi_hal_legacy"

This reverts commit 1addbeaa4672adae37ade6784d7a99b6bf1e0604.

It breaks WiFi connectivity on Fugu.

Bug: 37713566
Test: Able to connect to GoogleGuest on Fugu.
diff --git a/wifi/1.0/default/android.hardware.wifi@1.0-service.rc b/wifi/1.0/default/android.hardware.wifi@1.0-service.rc
index 3672423..696b1f9 100644
--- a/wifi/1.0/default/android.hardware.wifi@1.0-service.rc
+++ b/wifi/1.0/default/android.hardware.wifi@1.0-service.rc
@@ -2,4 +2,3 @@
     class hal
     user wifi
     group wifi gps
-    capabilities NET_ADMIN NET_RAW