Remove legacycaller from <object> and <embed>

Fixes #1971

source

@@ -28716,7 +28716,6 @@ interface <dfn>HTMLEmbedElement</dfn> : <span>HTMLElement</span> {
   [<span>CEReactions</span>] attribute DOMString <span data-x="dom-dim-width">width</span>;
   [<span>CEReactions</span>] attribute DOMString <span data-x="dom-dim-height">height</span>;
   <span>Document</span>? <span data-x="dom-media-getSVGDocument">getSVGDocument</span>();
-  <span data-x="dom-embed-caller">legacycaller</span> any (any... arguments);
 };</pre>
     <div w-nodev>
     <p>Depending on the type of content instantiated by the
@@ -29033,11 +29032,7 @@ attribute's value is a type that a <span>plugin</span> supports, then the value
   element that have no namespace to the <span>plugin</span> used, when one is instantiated.</p>
 
   <p>The <code>HTMLEmbedElement</code> object representing the element must expose the scriptable
-  interface of the <span>plugin</span> instantiated for the <code>embed</code> element, if any. At a
-  minimum, this interface must implement the <dfn data-x="dom-embed-caller">legacy caller
-  operation</dfn>. (It is suggested that the default behavior of this legacy caller operation, e.g.
-  the behavior of the default plugin's legacy caller operation, be to throw a
-  <span>"<code>NotSupportedError</code>"</span> <code>DOMException</code>.)</p>
+  interface of the <span>plugin</span> instantiated for the <code>embed</code> element, if any.</p>
 
   </div>
 
@@ -29122,8 +29117,6 @@ interface <dfn>HTMLObjectElement</dfn> : <span>HTMLElement</span> {
   boolean <span data-x="dom-cva-checkValidity">checkValidity</span>();
   boolean <span data-x="dom-cva-reportValidity">reportValidity</span>();
   void <span data-x="dom-cva-setCustomValidity">setCustomValidity</span>(DOMString error);
-
-  <span data-x="dom-object-caller">legacycaller</span> any (any... arguments);
 };</pre>
     <div w-nodev>
     <p>Depending on the type of content instantiated by the
@@ -29827,12 +29820,6 @@ interface <dfn>HTMLObjectElement</dfn> : <span>HTMLElement</span> {
   <span>constraint validation API</span>. The <code data-x="dom-fae-form">form</code> IDL attribute
   is part of the element's forms API.</p>
 
-  <p>All <code>object</code> elements have a <dfn data-x="dom-object-caller">legacy caller
-  operation</dfn>. If the <code>object</code> element has an instantiated <span>plugin</span> that
-  supports a scriptable interface that defines a legacy caller operation, then that must be the
-  behavior of the object's legacy caller operation. Otherwise, the object's legacy caller operation
-  must be to throw a <span>"<code>NotSupportedError</code>"</span> <code>DOMException</code>.</p>
-
   </div>
 
   <div class="example">