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/src/getEmptyImage.ts

@@ -0,0 +1,11 @@
+let emptyImage: HTMLImageElement | undefined
+
+export function getEmptyImage(): HTMLImageElement {
+	if (!emptyImage) {
+		emptyImage = new Image()
+		emptyImage.src =
+			'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=='
+	}
+
+	return emptyImage
+}