Remove a long-deprecated OPOIFS related method

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1681801 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/extractor/EventBasedExcelExtractor.java

@@ -84,16 +84,6 @@ public class EventBasedExcelExtractor extends POIOLE2TextExtractor implements or
       this(fs.getRoot());
    }
 
-   /**
-    * Return the underlying POIFS FileSystem of
-    *  this document.
-    *
-    * @deprecated Use {@link #getRoot()} instead
-    */
-   public POIFSFileSystem getFileSystem() {
-      return _dir.getFileSystem();
-   }
-
    /**
     * Would return the document information metadata for the document,
     *  if we supported it