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/EnterLeaveCounter.js

@@ -0,0 +1,26 @@
+import { union, without } from './utils/js_utils.js';
+export class EnterLeaveCounter {
+    enter(enteringNode) {
+        const previousLength = this.entered.length;
+        const isNodeEntered = (node)=>this.isNodeInDocument(node) && (!node.contains || node.contains(enteringNode))
+        ;
+        this.entered = union(this.entered.filter(isNodeEntered), [
+            enteringNode
+        ]);
+        return previousLength === 0 && this.entered.length > 0;
+    }
+    leave(leavingNode) {
+        const previousLength = this.entered.length;
+        this.entered = without(this.entered.filter(this.isNodeInDocument), leavingNode);
+        return previousLength > 0 && this.entered.length === 0;
+    }
+    reset() {
+        this.entered = [];
+    }
+    constructor(isNodeInDocument){
+        this.entered = [];
+        this.isNodeInDocument = isNodeInDocument;
+    }
+}
+
+//# sourceMappingURL=EnterLeaveCounter.js.map