[misc] Remove outdated Unstable annotations

xwiki-rendering-transformations/xwiki-rendering-transformation-macro/src/main/java/org/xwiki/rendering/macro/descriptor/ParameterDescriptor.java

@@ -22,7 +22,6 @@
 import java.lang.reflect.Type;
 
 import org.xwiki.properties.PropertyGroupDescriptor;
-import org.xwiki.stability.Unstable;
 
 /**
  * Define a macro parameter.
@@ -114,7 +113,6 @@ default Type getDisplayType()
      *         uses it to decide whether to display it or not in the Macro editor UI.
      * @since 12.4RC1
      */
-    @Unstable
     default boolean isDisplayHidden()
     {
         return false;

xwiki-rendering-xml/src/main/java/org/xwiki/rendering/renderer/printer/XHTMLWikiPrinter.java

@@ -23,7 +23,6 @@
 
 import org.apache.commons.lang3.StringUtils;
 import org.xml.sax.Attributes;
-import org.xwiki.stability.Unstable;
 
 /**
  * Base toolkit class for all XHTML-based renderers. This printer handles whitespaces so that it prints " " when
@@ -62,7 +61,6 @@ public XHTMLWikiPrinter(WikiPrinter printer)
      * is printed.
      * @since 12.2
      */
-    @Unstable
     public void setStandalone()
     {
         this.isStandalone = true;