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.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/elements/DesignChoiceConstants.java
public static final String PARAM_CONTROL_RADIO_BUTTON = "radio-button"; 
	public static final String PARAM_CONTROL_CHECK_BOX = "check-box"; 
	
	public static final String CHOICE_TEXT_ALIGN = "textAlign"; 
	public static final String TEXT_ALIGN_LEFT = "left"; 
	public static final String TEXT_ALIGN_CENTER = "center"; 
	public static final String TEXT_ALIGN_RIGHT = "right"; 
	public static final String TEXT_ALIGN_JUSTIFY = "justify"; 
	
	public static final String CHOICE_PAGE_SIZE = "pageSize"; 
	public static final String PAGE_SIZE_CUSTOM = "custom"; 
	public static final String PAGE_SIZE_US_LETTER = "us-letter"; 
	public static final String PAGE_SIZE_US_LEGAL = "us-legal"; 
	public static final String PAGE_SIZE_A4 = "a4"; 
	
	public static final String CHOICE_PAGE_ORIENTATION = "pageOrientation"; 
	public static final String PAGE_ORIENTATION_AUTO = "auto"; 
	public static final String PAGE_ORIENTATION_PORTRAIT = "portrait"; 
	public static final String PAGE_ORIENTATION_LANDSCAPE = "landscape"; 
	
	public static final String CHOICE_INTERVAL = "interval"; 
	public static final String INTERVAL_NONE = "none"; 
	public static final String INTERVAL_PREFIX = "prefix"; 
	public static final String INTERVAL_YEAR = "year"; 
	public static final String INTERVAL_QUARTER = "quarter"; 
	public static final String INTERVAL_MONTH = "month"; 
	public static final String INTERVAL_WEEK = "week"; 
	public static final String INTERVAL_DAY = "day"; 
	public static final String INTERVAL_HOUR = "hour"; 
	public static final String INTERVAL_MINUTE = "minute";