HBASE-16929 Move default method of shipped to Shipper interface

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java

@@ -115,13 +115,4 @@ public interface RegionScanner extends InternalScanner, Shipper {
    */
   boolean nextRaw(List<Cell> result, ScannerContext scannerContext)
       throws IOException;
-
-  /**
-   * Empty implementation to provide compatibility for user migrating from 1.X
-   * @see <a href="https://issues.apache.org/jira/browse/HBASE-16626">HBASE-16626</a>
-   */
-  @Override
-  default void shipped() throws IOException {
-    // do nothing
-  }
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Shipper.java

@@ -33,5 +33,5 @@ public interface Shipper {
    * Called after a batch of rows scanned and set to be returned to client. Any in between cleanup
    * can be done here.
    */
-  void shipped() throws IOException;
+  default void shipped() throws IOException { }
 }