Minor Fix in NetworkStatsService

Fix mistakes pointed out in
aosp/3195840 and aosp/3115462:
1. typo of bug id in comments
2. removal of unused funtion
3. removal of redundant blank lines

Test: TH
Bug: 343844995
Change-Id: I932e766c76e9a194d6718f3929bd50215d0b55cb
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 11343d2..9b7af49 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -313,7 +313,7 @@
     static final int DEFAULT_TRAFFIC_STATS_CACHE_MAX_ENTRIES = 400;
     /**
      * The delay time between to network stats update intents.
-     * Added to fix intent spams (b/3115462)
+     * Added to fix intent spams (b/343844995)
      */
     @VisibleForTesting(visibility = PRIVATE)
     static final int BROADCAST_NETWORK_STATS_UPDATED_DELAY_MS = 1000;
@@ -488,7 +488,6 @@
     @GuardedBy("mStatsLock")
     private long mLatestNetworkStatsUpdatedBroadcastScheduledTime = Long.MIN_VALUE;
 
-
     private final TrafficStatsRateLimitCache mTrafficStatsTotalCache;
     private final TrafficStatsRateLimitCache mTrafficStatsIfaceCache;
     private final TrafficStatsRateLimitCache mTrafficStatsUidCache;
@@ -499,7 +498,6 @@
     private final boolean mAlwaysUseTrafficStatsRateLimitCache;
     private final int mTrafficStatsRateLimitCacheExpiryDuration;
     private final int mTrafficStatsRateLimitCacheMaxEntries;
-
     private final boolean mBroadcastNetworkStatsUpdatedRateLimitEnabled;
 
 
@@ -724,15 +722,6 @@
     @VisibleForTesting
     public static class Dependencies {
         /**
-         * Get broadcast network stats updated delay time in ms
-         * @return
-         */
-        @NonNull
-        public long getBroadcastNetworkStatsUpdateDelayMs() {
-            return BROADCAST_NETWORK_STATS_UPDATED_DELAY_MS;
-        }
-
-        /**
          * Get legacy platform stats directory.
          */
         @NonNull