diff --git a/api/system-current.txt b/api/system-current.txt
index 0d1bb0d031128..2b2fafd92342d 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -1217,7 +1217,6 @@ package android.app.usage {
     method public int getUsageSource();
     method @RequiresPermission(allOf={android.Manifest.permission.SUSPEND_APPS, android.Manifest.permission.OBSERVE_APP_USAGE}) public void registerAppUsageLimitObserver(int, @NonNull String[], @NonNull java.time.Duration, @NonNull java.time.Duration, @Nullable android.app.PendingIntent);
     method @RequiresPermission(android.Manifest.permission.OBSERVE_APP_USAGE) public void registerAppUsageObserver(int, @NonNull String[], long, @NonNull java.util.concurrent.TimeUnit, @NonNull android.app.PendingIntent);
-    method @Deprecated @RequiresPermission(android.Manifest.permission.OBSERVE_APP_USAGE) public void registerUsageSessionObserver(int, @NonNull String[], long, @NonNull java.util.concurrent.TimeUnit, long, @NonNull java.util.concurrent.TimeUnit, @NonNull android.app.PendingIntent, @Nullable android.app.PendingIntent);
     method @RequiresPermission(android.Manifest.permission.OBSERVE_APP_USAGE) public void registerUsageSessionObserver(int, @NonNull String[], @NonNull java.time.Duration, @NonNull java.time.Duration, @NonNull android.app.PendingIntent, @Nullable android.app.PendingIntent);
     method public void reportUsageStart(@NonNull android.app.Activity, @NonNull String);
     method public void reportUsageStart(@NonNull android.app.Activity, @NonNull String, long);
diff --git a/core/java/android/app/usage/UsageStatsManager.java b/core/java/android/app/usage/UsageStatsManager.java
index eb1ea90e43826..f8dc20e9af098 100644
--- a/core/java/android/app/usage/UsageStatsManager.java
+++ b/core/java/android/app/usage/UsageStatsManager.java
@@ -678,29 +678,6 @@ public final class UsageStatsManager {
         }
     }
 
-
-    /**
-     * @deprecated use {@link #registerUsageSessionObserver(int, String[], Duration, Duration,
-     *                                                      PendingIntent, PendingIntent)}.
-     *
-     * @hide
-     */
-    @Deprecated
-    @SystemApi
-    @RequiresPermission(android.Manifest.permission.OBSERVE_APP_USAGE)
-    // STOPSHIP b/128455269: remove this method
-    public void registerUsageSessionObserver(int sessionObserverId,
-            @NonNull String[] observedEntities, long timeLimit, @NonNull TimeUnit timeUnit,
-            long sessionThresholdTime,  @NonNull TimeUnit sessionThresholdTimeUnit,
-            @NonNull PendingIntent limitReachedCallbackIntent,
-            @Nullable PendingIntent sessionEndCallbackIntent) {
-        final Duration timeLimitDuration = Duration.ofMillis(timeUnit.toMillis(timeLimit));
-        final Duration sessionThresholdDuration =
-                Duration.ofMillis(sessionThresholdTimeUnit.toMillis(sessionThresholdTime));
-        registerUsageSessionObserver(sessionObserverId, observedEntities, timeLimitDuration,
-                sessionThresholdDuration, limitReachedCallbackIntent, sessionEndCallbackIntent);
-    }
-
     /**
      * Register a usage session observer that receives a callback on the provided {@code
      * limitReachedCallbackIntent} when the sum of usages of apps and tokens in the {@code