Remove unused method tryGetWifiInfoForVcn

Remove hidden API usages backed by VCN since they will
not be accessible anymore when VCN is moved to mainline.

Bug: 369710077
Test: presubmit
Flag: EXEMPT remove unused code
Change-Id: I9020e6f647795cfa6fd64f32a2c6f1eda2d93a1b
diff --git a/SettingsAPI/java/com/android/tv/settings/library/about/Utils.java b/SettingsAPI/java/com/android/tv/settings/library/about/Utils.java
index 265bc34..fd27dcc 100644
--- a/SettingsAPI/java/com/android/tv/settings/library/about/Utils.java
+++ b/SettingsAPI/java/com/android/tv/settings/library/about/Utils.java
@@ -1,7 +1,6 @@
 package com.android.tv.settings.library.about;
 
 import android.annotation.ColorInt;
-import android.annotation.Nullable;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
@@ -18,9 +17,6 @@
 import android.graphics.ColorMatrixColorFilter;
 import android.graphics.drawable.Drawable;
 import android.media.AudioManager;
-import android.net.NetworkCapabilities;
-import android.net.vcn.VcnTransportInfo;
-import android.net.wifi.WifiInfo;
 import android.os.BatteryManager;
 import android.telephony.AccessNetworkConstants;
 import android.telephony.NetworkRegistrationInfo;
@@ -296,21 +292,4 @@
         drawable.draw(canvas);
         return roundedBitmap;
     }
-
-    /**
-     * Returns the WifiInfo for the underlying WiFi network of the VCN network, returns null if the
-     * input NetworkCapabilities is not for a VCN network with underlying WiFi network.
-     *
-     * @param networkCapabilities NetworkCapabilities of the network.
-     */
-    @Nullable
-    public static WifiInfo tryGetWifiInfoForVcn(NetworkCapabilities networkCapabilities) {
-        if (networkCapabilities.getTransportInfo() == null
-                || !(networkCapabilities.getTransportInfo() instanceof VcnTransportInfo)) {
-            return null;
-        }
-        VcnTransportInfo vcnTransportInfo =
-                (VcnTransportInfo) networkCapabilities.getTransportInfo();
-        return vcnTransportInfo.getWifiInfo();
-    }
 }