Bug 124501 need uninstall of jst.utility facet
The jst.utility facet needs an uninstall delegate. Without it, it is not possible to deselect this facet and select/install the Dynamic Web Module facet on an existing project.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/core/model/schematic/TableHandleAdapter.java
if ( getColumnCount( ) == columns.length )
		{
			getHandle( ).drop( );
			transEnd( );
			return;
		}
		Arrays.sort( columns );
		List temp = new ArrayList( );
		int len = columns.length;
		for ( int i = 0; i < len; i++ )
		{
			temp.add( getColumn( columns[i] ) );
		}
		for ( int i = 0; i < len; i++ )
		{
			
			deleteColumn( HandleAdapterFactory.getInstance( )
					.getColumnHandleAdapter( temp.get( i ) ).getColumnNumber( ) );
		}
		transEnd( );
	}
	/**
	 * Delete a specific column from the current table.
	 * 
	 * @param columnNumber
	 *            The column to be deleted.
	 * @throws SemanticException
	 */
	public void deleteColumn( int columnNumber ) throws SemanticException
	{