Fixing import errors in LlamaIndex tutorial (#4595)

Closes #4594

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -19,7 +19,7 @@ These are the section headers that we use:
 ## [1.24.0](https://github.com/argilla-io/argilla/compare/v1.23.0...v1.24.0)
 
 >[!NOTE]
-> This release does not contain any new features, but it includes a major change in the `argilla-server` dependency. 
+> This release does not contain any new features, but it includes a major change in the `argilla-server` dependency.
 > The package is using the `argilla-server` dependency defined [here](https://github.com/argilla-io/argilla-server). ([#4537](https://github.com/argilla-io/argilla/pull/4537))
 
 ### Changed

docs/_source/tutorials_and_integrations/tutorials/feedback/fine-tuning-openai-rag-feedback.ipynb

@@ -72,10 +72,8 @@
       "source": [
         "# Import the needed libraries\n",
         "import os\n",
-        "import json\n",
         "import random\n",
         "from tqdm import tqdm\n",
-        "import time\n",
         "import matplotlib.pyplot as plt\n",
         "\n",
         "import openai\n",
@@ -84,13 +82,11 @@
         "from argilla.feedback import TrainingTask\n",
         "from argilla.feedback import ArgillaTrainer\n",
         "\n",
-        "from typing import Dict, Any, Iterator\n",
         "from typing import Union, Tuple, List\n",
         "\n",
-        "from llama_index import SimpleDirectoryReader, ServiceContext, download_loader\n",
-        "from llama_index.llms import OpenAI\n",
-        "from llama_index.evaluation import DatasetGenerator\n",
-        "from llama_index import VectorStoreIndex\n",
+        "from llama_index.core import ServiceContext, VectorStoreIndex, download_loader\n",
+        "from llama_index.llms.openai import OpenAI\n",
+        "from llama_index.core.evaluation import DatasetGenerator\n",
         "\n",
         "from datasets import load_dataset"
       ]