Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
{
				ColumnHintHandle modelColumnHint = ( ColumnHintHandle ) elmtIter
						.next( );
				ColumnDefinition existDefn = findColumnDefn( columnDefns,
						modelColumnHint.getColumnName( ) );
				if ( existDefn != null )
					updateColumnDefn( existDefn, modelColumnHint );
				else
					dteDataSet
							.addResultSetHint( newColumnDefn( modelColumnHint ) );
			}
		}
	}
	/**
	 * Creates a new DtE API IParameterDefinition from a model's
	 * DataSetParameterHandle.
	 */
	IParameterDefinition newParam( DataSetParameterHandle modelParam )
	{
		ParameterDefinition dteParam = new ParameterDefinition( );
		dteParam.setName( modelParam.getName( ) );
		if ( modelParam.getPosition( ) != null )
			dteParam.setPosition( modelParam.getPosition( ).intValue( ) );
		dteParam.setType( toDteDataType( modelParam.getDataType( ) ) );
		dteParam.setInputMode( modelParam.isInput( ) );
		dteParam.setOutputMode( modelParam.isOutput( ) );
		dteParam.setNullable( modelParam.allowNull( ) );
		dteParam.setInputOptional( modelParam.isOptional( ) );
		dteParam.setDefaultInputValue( modelParam.getDefaultValue( ) );
		return dteParam;