Remove chatty log from WiFiNative

When verbose debugging is enabled, every beacon frame generates a log
stating the DTIM value. This was left behind from development of DTIM
tracking.

BUG=29055049
TEST=unit tests
Change-Id: I3923536094b1894b940754101123f38518a5d519
diff --git a/service/java/com/android/server/wifi/WifiNative.java b/service/java/com/android/server/wifi/WifiNative.java
index fa8ce49..f268f62 100644
--- a/service/java/com/android/server/wifi/WifiNative.java
+++ b/service/java/com/android/server/wifi/WifiNative.java
@@ -708,11 +708,6 @@
 
                             NetworkDetail networkDetail = new NetworkDetail(bssid,
                                     infoElements, anqpLines, freq);
-                            if (DBG) {
-                                Log.v(TAG + ":DTIM", "SSID" + networkDetail.getSSID()
-                                        + ", DTIM=" + networkDetail.getDtimInterval() + ", "
-                                        + " IEstr:" + infoElementsStr);
-                            }
                             String xssid = (wifiSsid != null) ? wifiSsid.toString() : WifiSsid.NONE;
                             if (!xssid.equals(networkDetail.getTrimmedSSID())) {
                                 Log.d(TAG, String.format(