diff --git a/core/java/com/android/internal/net/NetworkStatsFactory.java b/core/java/com/android/internal/net/NetworkStatsFactory.java
index e5cbdde544..c4d08c7dc5 100644
--- a/core/java/com/android/internal/net/NetworkStatsFactory.java
+++ b/core/java/com/android/internal/net/NetworkStatsFactory.java
@@ -56,8 +56,6 @@ public class NetworkStatsFactory {
     private static final boolean USE_NATIVE_PARSING = true;
     private static final boolean SANITY_CHECK_NATIVE = false;
 
-    /** Path to {@code /proc/net/dev}. */
-    private final File mStatsIfaceDev;
     /** Path to {@code /proc/net/xt_qtaguid/iface_stat_all}. */
     private final File mStatsXtIfaceAll;
     /** Path to {@code /proc/net/xt_qtaguid/iface_stat_fmt}. */
@@ -133,51 +131,12 @@ public class NetworkStatsFactory {
 
     @VisibleForTesting
     public NetworkStatsFactory(File procRoot, boolean useBpfStats) {
-        mStatsIfaceDev = new File(procRoot, "net/dev");
         mStatsXtIfaceAll = new File(procRoot, "net/xt_qtaguid/iface_stat_all");
         mStatsXtIfaceFmt = new File(procRoot, "net/xt_qtaguid/iface_stat_fmt");
         mStatsXtUid = new File(procRoot, "net/xt_qtaguid/stats");
         mUseBpfStats = useBpfStats;
     }
 
-    @VisibleForTesting
-    public NetworkStats readNetworkStatsIfaceDev() throws IOException {
-        final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
-
-        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
-        final NetworkStats.Entry entry = new NetworkStats.Entry();
-
-        BufferedReader reader = null;
-        try {
-            reader = new BufferedReader(new FileReader(mStatsIfaceDev));
-
-            // skip first two header lines
-            reader.readLine();
-            reader.readLine();
-
-            // parse remaining lines
-            String line;
-            while ((line = reader.readLine()) != null) {
-                String[] values = line.trim().split("\\:?\\s+");
-                entry.iface = values[0];
-                entry.uid = UID_ALL;
-                entry.set = SET_ALL;
-                entry.tag = TAG_NONE;
-                entry.rxBytes = Long.parseLong(values[1]);
-                entry.rxPackets = Long.parseLong(values[2]);
-                entry.txBytes = Long.parseLong(values[9]);
-                entry.txPackets = Long.parseLong(values[10]);
-                stats.addValues(entry);
-            }
-        } catch (NullPointerException|NumberFormatException e) {
-            throw new ProtocolException("problem parsing stats", e);
-        } finally {
-            IoUtils.closeQuietly(reader);
-            StrictMode.setThreadPolicy(savedPolicy);
-        }
-        return stats;
-    }
-
     public NetworkStats readBpfNetworkStatsDev() throws IOException {
         final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
         if (nativeReadNetworkStatsDev(stats) != 0) {