diff --git a/src/wp-admin/js/accordion.js b/src/wp-admin/js/accordion.js
deleted file mode 100644
index c420e8ccb8..0000000000
--- a/src/wp-admin/js/accordion.js
+++ /dev/null
@@ -1,94 +0,0 @@
-/**
- * Accordion-folding functionality.
- *
- * Markup with the appropriate classes will be automatically hidden,
- * with one section opening at a time when its title is clicked.
- * Use the following markup structure for accordion behavior:
- *
- * <div class="accordion-container">
- *	<div class="accordion-section open">
- *		<h3 class="accordion-section-title"></h3>
- *		<div class="accordion-section-content">
- *		</div>
- *	</div>
- *	<div class="accordion-section">
- *		<h3 class="accordion-section-title"></h3>
- *		<div class="accordion-section-content">
- *		</div>
- *	</div>
- *	<div class="accordion-section">
- *		<h3 class="accordion-section-title"></h3>
- *		<div class="accordion-section-content">
- *		</div>
- *	</div>
- * </div>
- *
- * Note that any appropriate tags may be used, as long as the above classes are present.
- *
- * @since 3.6.0
- * @output wp-admin/js/accordion.js
- */
-
-( function( $ ){
-
-	$( function () {
-
-		// Expand/Collapse accordion sections on click.
-		$( '.accordion-container' ).on( 'click keydown', '.accordion-section-title', function( e ) {
-			if ( e.type === 'keydown' && 13 !== e.which ) { // "Return" key.
-				return;
-			}
-
-			e.preventDefault(); // Keep this AFTER the key filter above.
-
-			accordionSwitch( $( this ) );
-		});
-
-	});
-
-	/**
-	 * Close the current accordion section and open a new one.
-	 *
-	 * @param {Object} el Title element of the accordion section to toggle.
-	 * @since 3.6.0
-	 */
-	function accordionSwitch ( el ) {
-		var section = el.closest( '.accordion-section' ),
-			sectionToggleControl = section.find( '[aria-expanded]' ).first(),
-			container = section.closest( '.accordion-container' ),
-			siblings = container.find( '.open' ),
-			siblingsToggleControl = siblings.find( '[aria-expanded]' ).first(),
-			content = section.find( '.accordion-section-content' );
-
-		// This section has no content and cannot be expanded.
-		if ( section.hasClass( 'cannot-expand' ) ) {
-			return;
-		}
-
-		// Add a class to the container to let us know something is happening inside.
-		// This helps in cases such as hiding a scrollbar while animations are executing.
-		container.addClass( 'opening' );
-
-		if ( section.hasClass( 'open' ) ) {
-			section.toggleClass( 'open' );
-			content.toggle( true ).slideToggle( 150 );
-		} else {
-			siblingsToggleControl.attr( 'aria-expanded', 'false' );
-			siblings.removeClass( 'open' );
-			siblings.find( '.accordion-section-content' ).show().slideUp( 150 );
-			content.toggle( false ).slideToggle( 150 );
-			section.toggleClass( 'open' );
-		}
-
-		// We have to wait for the animations to finish.
-		setTimeout(function(){
-		    container.removeClass( 'opening' );
-		}, 150);
-
-		// If there's an element with an aria-expanded attribute, assume it's a toggle control and toggle the aria-expanded value.
-		if ( sectionToggleControl ) {
-			sectionToggleControl.attr( 'aria-expanded', String( sectionToggleControl.attr( 'aria-expanded' ) === 'false' ) );
-		}
-	}
-
-})(jQuery);