Fix a typo in comment.

Change-Id: I23224b1adf946ebec0ec7a39686913189c9b8287
diff --git a/core/java/android/net/NetworkInfo.java b/core/java/android/net/NetworkInfo.java
index 7664c95..393637e 100644
--- a/core/java/android/net/NetworkInfo.java
+++ b/core/java/android/net/NetworkInfo.java
@@ -411,8 +411,7 @@
 
     /**
      * Report the extra information about the network state, if any was
-     * provided by the lower networking layers.,
-     * if one is available.
+     * provided by the lower networking layers.
      * @return the extra information, or null if not available
      */
     public String getExtraInfo() {