Remove gallery card related CSS and JS

assets/js/gallery-card.js

@@ -1,24 +0,0 @@
-/* eslint-env browser */
-
-/**
- * Gallery card support
- * Used on any individual post/page
- *
- * Detects when a gallery card has been used and applies sizing to make sure
- * the display matches what is seen in the editor.
- */
-
-(function (window, document) {
-    var resizeImagesInGalleries = function resizeImagesInGalleries() {
-        var images = document.querySelectorAll('.kg-gallery-image img');
-        images.forEach(function (image) {
-            var container = image.closest('.kg-gallery-image');
-            var width = image.attributes.width.value;
-            var height = image.attributes.height.value;
-            var ratio = width / height;
-            container.style.flex = ratio + ' 1 0%';
-        });
-    };
-
-    document.addEventListener('DOMContentLoaded', resizeImagesInGalleries);
-})(window, document);