Remove "public" to follow our convention

Change-Id: Ic5fa8744cbcb4c704780c8467ae0f31fce3327ce
diff --git a/core/api/src/main/java/org/onosproject/net/SparseAnnotations.java b/core/api/src/main/java/org/onosproject/net/SparseAnnotations.java
index e86b50c..97961b3 100644
--- a/core/api/src/main/java/org/onosproject/net/SparseAnnotations.java
+++ b/core/api/src/main/java/org/onosproject/net/SparseAnnotations.java
@@ -30,7 +30,7 @@
      * </p>
      */
     @Override
-    public Set<String> keys();
+    Set<String> keys();
 
     /**
      * Indicates whether the specified key has been tagged as removed. This is
@@ -39,6 +39,6 @@
      * @param key annotation key
      * @return true if the previous annotation has been tagged for removal
      */
-    public boolean isRemoved(String key);
+    boolean isRemoved(String key);
 
 }