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
assert ( paramName != null && paramName instanceof String );
					String expression = ( String ) paramBindingCandidates
							.get( paramName );
					dteDataSet.addInputParamBinding( newInputParamBinding(
							( String ) paramName, expression ) );
				}
			}
			
			dteDataSet.setCacheRowCount( modelDataSet.getCachedRowCount( ) );
		}
	
		
		Iterator elmtIter = modelDataSet.computedColumnsIterator( );
		if ( elmtIter != null )
		{
			while ( elmtIter.hasNext( ) )
			{
				ComputedColumnHandle modelCmptdColumn = ( ComputedColumnHandle ) elmtIter
						.next( );
				IComputedColumn dteCmptdColumn = newComputedColumn( modelCmptdColumn );
				dteDataSet.addComputedColumn( dteCmptdColumn );
			}
		}
		
		elmtIter = modelDataSet.filtersIterator( );
		if ( elmtIter != null )
		{
			while ( elmtIter.hasNext( ) )
			{
				FilterConditionHandle modelFilter = ( FilterConditionHandle ) elmtIter