Bug 134954 Library can't be removed
Steps to reproduce: 1.New a report "a.rptdesign" 2.New a library which is not in the same fold with report, saying "../test/lib.rptlibrary" 3.Report includes the library 4.Remove the library Expected result: The library is removed Actual result: Open XMLSource, the included library structure is still there.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/LibraryCommand.java
*            <code>true</code> if drop the library even the module has
	 *            element reference to this library. <code>false</code> if do
	 *            not drop library when the module has element reference to this
	 *            library.
	 * @throws SemanticException
	 *             if failed to remove <code>IncludeLibrary</code> strcutre
	 */
	public void dropLibrary( Library library ) throws SemanticException
	{
		
		if ( !module.getLibraries( ).contains( library ) )
		{
			throw new LibraryException( library, new String[]{library
					.getNamespace( )},
					LibraryException.DESIGN_EXCEPTION_LIBRARY_NOT_FOUND );
		}
		
		
		dealAllElementDecendents( library, SIMPLE_ACTION );
		doDropLibrary( library );
	}
	/**
	 * Performs the action to drop the library from the module.
	 * 
	 * @param library
	 *            the library to drop
	 * @param action
	 *            can be RELOAD or SIMPLE.
	 * @throws SemanticException
	 *             if error occurs during insert an included library