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diff --git a/vendor/oojs/oojs-ui/src/elements/TabIndexedElement.js b/vendor/oojs/oojs-ui/src/elements/TabIndexedElement.js
deleted file mode 100644
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--- a/vendor/oojs/oojs-ui/src/elements/TabIndexedElement.js
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@@ -1,138 +0,0 @@
-/**
- * The TabIndexedElement class is an attribute mixin used to add additional functionality to an
- * element created by another class. The mixin provides a ‘tabIndex’ property, which specifies the
- * order in which users will navigate through the focusable elements via the "tab" key.
- *
- *     @example
- *     // TabIndexedElement is mixed into the ButtonWidget class
- *     // to provide a tabIndex property.
- *     var button1 = new OO.ui.ButtonWidget( {
- *         label: 'fourth',
- *         tabIndex: 4
- *     } );
- *     var button2 = new OO.ui.ButtonWidget( {
- *         label: 'second',
- *         tabIndex: 2
- *     } );
- *     var button3 = new OO.ui.ButtonWidget( {
- *         label: 'third',
- *         tabIndex: 3
- *     } );
- *     var button4 = new OO.ui.ButtonWidget( {
- *         label: 'first',
- *         tabIndex: 1
- *     } );
- *     $( 'body' ).append( button1.$element, button2.$element, button3.$element, button4.$element );
- *
- * @abstract
- * @class
- *
- * @constructor
- * @param {Object} [config] Configuration options
- * @cfg {jQuery} [$tabIndexed] The element that should use the tabindex functionality. By default,
- *  the functionality is applied to the element created by the class ($element). If a different element is specified, the tabindex
- *  functionality will be applied to it instead.
- * @cfg {number|null} [tabIndex=0] Number that specifies the element’s position in the tab-navigation
- *  order (e.g., 1 for the first focusable element). Use 0 to use the default navigation order; use -1
- *  to remove the element from the tab-navigation flow.
- */
-OO.ui.TabIndexedElement = function OoUiTabIndexedElement( config ) {
-	// Configuration initialization
-	config = $.extend( { tabIndex: 0 }, config );
-
-	// Properties
-	this.$tabIndexed = null;
-	this.tabIndex = null;
-
-	// Events
-	this.connect( this, { disable: 'onDisable' } );
-
-	// Initialization
-	this.setTabIndex( config.tabIndex );
-	this.setTabIndexedElement( config.$tabIndexed || this.$element );
-};
-
-/* Setup */
-
-OO.initClass( OO.ui.TabIndexedElement );
-
-/* Methods */
-
-/**
- * Set the element that should use the tabindex functionality.
- *
- * This method is used to retarget a tabindex mixin so that its functionality applies
- * to the specified element. If an element is currently using the functionality, the mixin’s
- * effect on that element is removed before the new element is set up.
- *
- * @param {jQuery} $tabIndexed Element that should use the tabindex functionality
- * @chainable
- */
-OO.ui.TabIndexedElement.prototype.setTabIndexedElement = function ( $tabIndexed ) {
-	var tabIndex = this.tabIndex;
-	// Remove attributes from old $tabIndexed
-	this.setTabIndex( null );
-	// Force update of new $tabIndexed
-	this.$tabIndexed = $tabIndexed;
-	this.tabIndex = tabIndex;
-	return this.updateTabIndex();
-};
-
-/**
- * Set the value of the tabindex.
- *
- * @param {number|null} tabIndex Tabindex value, or `null` for no tabindex
- * @chainable
- */
-OO.ui.TabIndexedElement.prototype.setTabIndex = function ( tabIndex ) {
-	tabIndex = typeof tabIndex === 'number' ? tabIndex : null;
-
-	if ( this.tabIndex !== tabIndex ) {
-		this.tabIndex = tabIndex;
-		this.updateTabIndex();
-	}
-
-	return this;
-};
-
-/**
- * Update the `tabindex` attribute, in case of changes to tab index or
- * disabled state.
- *
- * @private
- * @chainable
- */
-OO.ui.TabIndexedElement.prototype.updateTabIndex = function () {
-	if ( this.$tabIndexed ) {
-		if ( this.tabIndex !== null ) {
-			// Do not index over disabled elements
-			this.$tabIndexed.attr( {
-				tabindex: this.isDisabled() ? -1 : this.tabIndex,
-				// ChromeVox and NVDA do not seem to inherit this from parent elements
-				'aria-disabled': this.isDisabled().toString()
-			} );
-		} else {
-			this.$tabIndexed.removeAttr( 'tabindex aria-disabled' );
-		}
-	}
-	return this;
-};
-
-/**
- * Handle disable events.
- *
- * @private
- * @param {boolean} disabled Element is disabled
- */
-OO.ui.TabIndexedElement.prototype.onDisable = function () {
-	this.updateTabIndex();
-};
-
-/**
- * Get the value of the tabindex.
- *
- * @return {number|null} Tabindex value
- */
-OO.ui.TabIndexedElement.prototype.getTabIndex = function () {
-	return this.tabIndex;
-};