diff --git a/staticlibs/framework/com/android/net/module/util/NetworkStatsUtils.java b/staticlibs/framework/com/android/net/module/util/NetworkStatsUtils.java
index 41a9428..28ff770 100644
--- a/staticlibs/framework/com/android/net/module/util/NetworkStatsUtils.java
+++ b/staticlibs/framework/com/android/net/module/util/NetworkStatsUtils.java
@@ -16,23 +16,12 @@
 
 package com.android.net.module.util;
 
-import android.app.usage.NetworkStats;
-
-import com.android.internal.annotations.VisibleForTesting;
-
 /**
  * Various utilities used for NetworkStats related code.
  *
  * @hide
  */
 public class NetworkStatsUtils {
-    // These constants must be synced with the definition in android.net.NetworkStats.
-    // TODO: update to formal APIs once all downstreams have these APIs.
-    private static final int SET_ALL = -1;
-    private static final int METERED_ALL = -1;
-    private static final int ROAMING_ALL = -1;
-    private static final int DEFAULT_NETWORK_ALL = -1;
-
     /**
      * Safely multiple a value by a rational.
      * <p>
@@ -99,77 +88,4 @@
         if (low > high) throw new IllegalArgumentException("low(" + low + ") > high(" + high + ")");
         return amount < low ? low : (amount > high ? high : amount);
     }
-
-    /**
-     * Convert structure from android.app.usage.NetworkStats to android.net.NetworkStats.
-     */
-    public static android.net.NetworkStats fromPublicNetworkStats(
-            NetworkStats publiceNetworkStats) {
-        android.net.NetworkStats stats = new android.net.NetworkStats(0L, 0);
-        while (publiceNetworkStats.hasNextBucket()) {
-            NetworkStats.Bucket bucket = new NetworkStats.Bucket();
-            publiceNetworkStats.getNextBucket(bucket);
-            final android.net.NetworkStats.Entry entry = fromBucket(bucket);
-            stats = stats.addEntry(entry);
-        }
-        return stats;
-    }
-
-    @VisibleForTesting
-    public static android.net.NetworkStats.Entry fromBucket(NetworkStats.Bucket bucket) {
-        return new android.net.NetworkStats.Entry(
-                null /* IFACE_ALL */, bucket.getUid(), convertBucketState(bucket.getState()),
-                convertBucketTag(bucket.getTag()), convertBucketMetered(bucket.getMetered()),
-                convertBucketRoaming(bucket.getRoaming()),
-                convertBucketDefaultNetworkStatus(bucket.getDefaultNetworkStatus()),
-                bucket.getRxBytes(), bucket.getRxPackets(),
-                bucket.getTxBytes(), bucket.getTxPackets(), 0 /* operations */);
-    }
-
-    private static int convertBucketState(int networkStatsSet) {
-        switch (networkStatsSet) {
-            case NetworkStats.Bucket.STATE_ALL: return SET_ALL;
-            case NetworkStats.Bucket.STATE_DEFAULT: return android.net.NetworkStats.SET_DEFAULT;
-            case NetworkStats.Bucket.STATE_FOREGROUND:
-                return android.net.NetworkStats.SET_FOREGROUND;
-        }
-        return 0;
-    }
-
-    private static int convertBucketTag(int tag) {
-        switch (tag) {
-            case NetworkStats.Bucket.TAG_NONE: return android.net.NetworkStats.TAG_NONE;
-        }
-        return tag;
-    }
-
-    private static int convertBucketMetered(int metered) {
-        switch (metered) {
-            case NetworkStats.Bucket.METERED_ALL: return METERED_ALL;
-            case NetworkStats.Bucket.METERED_NO: return android.net.NetworkStats.METERED_NO;
-            case NetworkStats.Bucket.METERED_YES: return android.net.NetworkStats.METERED_YES;
-        }
-        return 0;
-    }
-
-    private static int convertBucketRoaming(int roaming) {
-        switch (roaming) {
-            case NetworkStats.Bucket.ROAMING_ALL: return ROAMING_ALL;
-            case NetworkStats.Bucket.ROAMING_NO: return android.net.NetworkStats.ROAMING_NO;
-            case NetworkStats.Bucket.ROAMING_YES: return android.net.NetworkStats.ROAMING_YES;
-        }
-        return 0;
-    }
-
-    private static int convertBucketDefaultNetworkStatus(int defaultNetworkStatus) {
-        switch (defaultNetworkStatus) {
-            case NetworkStats.Bucket.DEFAULT_NETWORK_ALL:
-                return DEFAULT_NETWORK_ALL;
-            case NetworkStats.Bucket.DEFAULT_NETWORK_NO:
-                return android.net.NetworkStats.DEFAULT_NETWORK_NO;
-            case NetworkStats.Bucket.DEFAULT_NETWORK_YES:
-                return android.net.NetworkStats.DEFAULT_NETWORK_YES;
-        }
-        return 0;
-    }
 }
diff --git a/staticlibs/tests/unit/src/com/android/net/module/util/NetworkStatsUtilsTest.kt b/staticlibs/tests/unit/src/com/android/net/module/util/NetworkStatsUtilsTest.kt
index baadad0..9981b6a 100644
--- a/staticlibs/tests/unit/src/com/android/net/module/util/NetworkStatsUtilsTest.kt
+++ b/staticlibs/tests/unit/src/com/android/net/module/util/NetworkStatsUtilsTest.kt
@@ -16,16 +16,12 @@
 
 package com.android.net.module.util
 
-import android.net.NetworkStats
 import androidx.test.filters.SmallTest
 import androidx.test.runner.AndroidJUnit4
-import com.android.testutils.assertEntryEquals
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
 import org.junit.Test
 import org.junit.runner.RunWith
-import org.mockito.Mockito.doReturn
-import org.mockito.Mockito.mock
 
 @RunWith(AndroidJUnit4::class)
 @SmallTest
@@ -75,48 +71,4 @@
         assertEquals(11, NetworkStatsUtils.constrain(11, 11, 11))
         assertEquals(11, NetworkStatsUtils.constrain(1, 11, 11))
     }
-
-    @Test
-    fun testBucketToEntry() {
-        val bucket = makeMockBucket(android.app.usage.NetworkStats.Bucket.UID_ALL,
-                android.app.usage.NetworkStats.Bucket.TAG_NONE,
-                android.app.usage.NetworkStats.Bucket.STATE_DEFAULT,
-                android.app.usage.NetworkStats.Bucket.METERED_YES,
-                android.app.usage.NetworkStats.Bucket.ROAMING_NO,
-                android.app.usage.NetworkStats.Bucket.DEFAULT_NETWORK_ALL, 1024, 8, 2048, 12)
-        val entry = NetworkStatsUtils.fromBucket(bucket)
-        val expectedEntry = NetworkStats.Entry(null /* IFACE_ALL */, NetworkStats.UID_ALL,
-            NetworkStats.SET_DEFAULT, NetworkStats.TAG_NONE, NetworkStats.METERED_YES,
-            NetworkStats.ROAMING_NO, NetworkStats.DEFAULT_NETWORK_ALL, 1024, 8, 2048, 12,
-            0 /* operations */)
-
-        assertEntryEquals(expectedEntry, entry)
-    }
-
-    private fun makeMockBucket(
-        uid: Int,
-        tag: Int,
-        state: Int,
-        metered: Int,
-        roaming: Int,
-        defaultNetwork: Int,
-        rxBytes: Long,
-        rxPackets: Long,
-        txBytes: Long,
-        txPackets: Long
-    ): android.app.usage.NetworkStats.Bucket {
-        val ret: android.app.usage.NetworkStats.Bucket =
-                mock(android.app.usage.NetworkStats.Bucket::class.java)
-        doReturn(uid).`when`(ret).getUid()
-        doReturn(tag).`when`(ret).getTag()
-        doReturn(state).`when`(ret).getState()
-        doReturn(metered).`when`(ret).getMetered()
-        doReturn(roaming).`when`(ret).getRoaming()
-        doReturn(defaultNetwork).`when`(ret).getDefaultNetworkStatus()
-        doReturn(rxBytes).`when`(ret).getRxBytes()
-        doReturn(rxPackets).`when`(ret).getRxPackets()
-        doReturn(txBytes).`when`(ret).getTxBytes()
-        doReturn(txPackets).`when`(ret).getTxPackets()
-        return ret
-    }
 }
\ No newline at end of file