protected void removeCurrentRow() {
      ((Row)getCurrentRow()).setDeleted();
      rvh.remove(cursorPos - 1);
      --numRows;
   }
Removes the row on which the cursor is positioned.
<p>
This is a implementation only method and is not required as a standard
implementation of the <code>CachedRowSet</code> interface.

@throws SQLException if the cursor is positioned on the insert
           row
src/main/java/org/replicadb/rowset/StreamingRowSetImpl.java