Clean up unused AX APIs.

Source/modules/accessibility/AXNodeObject.cpp

Index: Source/modules/accessibility/AXNodeObject.cpp
diff --git a/Source/modules/accessibility/AXNodeObject.cpp b/Source/modules/accessibility/AXNodeObject.cpp
index 72003a91aef163a21e51dd164b5275f054b5a375..f1f402d6f86ebaee1adb1c13bbd2f62209568126 100644
--- a/Source/modules/accessibility/AXNodeObject.cpp
+++ b/Source/modules/accessibility/AXNodeObject.cpp
@@ -1476,19 +1476,6 @@ String AXNodeObject::stringValue() const
     return String();
 }
 
-
-const AtomicString& AXNodeObject::textInputType() const
-{
-    Node* node = this->node();
-    if (!isHTMLInputElement(node))
-        return nullAtom;
-
-    HTMLInputElement& input = toHTMLInputElement(*node);
-    if (input.isTextField())
-        return input.type();
-    return nullAtom;
-}
-
 String AXNodeObject::ariaDescribedByAttribute() const
 {
     WillBeHeapVector<RawPtrWillBeMember<Element>> elements;
@@ -1497,11 +1484,6 @@ String AXNodeObject::ariaDescribedByAttribute() const
     return accessibilityDescriptionForElements(elements);
 }
 
-const AtomicString& AXNodeObject::ariaDropEffect() const
-{
-    return getAttribute(aria_dropeffectAttr);
-}
-
 String AXNodeObject::ariaLabeledByAttribute() const
 {
     WillBeHeapVector<RawPtrWillBeMember<Element>> elements;
@@ -1515,17 +1497,6 @@ AccessibilityRole AXNodeObject::ariaRoleAttribute() const
     return m_ariaRole;
 }
 
-AccessibilityOptionalBool AXNodeObject::isAriaGrabbed() const
-{
-    const AtomicString& grabbed = getAttribute(aria_grabbedAttr);
-    if (equalIgnoringCase(grabbed, "true"))
-        return OptionalBoolTrue;
-    if (equalIgnoringCase(grabbed, "false"))
-        return OptionalBoolFalse;
-
-    return OptionalBoolUndefined;
-}
-
 // When building the textUnderElement for an object, determine whether or not
 // we should include the inner text of this given descendant object or skip it.
 static bool shouldUseAccessibilityObjectInnerText(AXObject* obj)