Revert "Add yet-another-react-lightbox package and update .gitignore to exclude node_modules"

This reverts commit c92f4a5edd.

frontend/node_modules/react-dnd-html5-backend/dist/utils/js_utils.js

@@ -0,0 +1,30 @@
+// cheap lodash replacements
+export function memoize(fn) {
+    let result = null;
+    const memoized = ()=>{
+        if (result == null) {
+            result = fn();
+        }
+        return result;
+    };
+    return memoized;
+}
+/**
+ * drop-in replacement for _.without
+ */ export function without(items, item) {
+    return items.filter((i)=>i !== item
+    );
+}
+export function union(itemsA, itemsB) {
+    const set = new Set();
+    const insertItem = (item)=>set.add(item)
+    ;
+    itemsA.forEach(insertItem);
+    itemsB.forEach(insertItem);
+    const result = [];
+    set.forEach((key)=>result.push(key)
+    );
+    return result;
+}
+
+//# sourceMappingURL=js_utils.js.map