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.d.ts

@@ -0,0 +1,6 @@
+export declare function memoize<T>(fn: () => T): () => T;
+/**
+ * drop-in replacement for _.without
+ */
+export declare function without<T>(items: T[], item: T): T[];
+export declare function union<T extends string | number>(itemsA: T[], itemsB: T[]): T[];