Remove query until we have a better way to show this use case (#498)

## Problem

Remove query until we have a better way to show this use case.

## Solution

Describe the approach you took. Link to any relevant bugs, issues, docs,
or other resources.

## Type of Change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [ ] Non-code change (docs, etc)
- [ ] None of the above: (explain here)

## Test Plan

Describe specific steps for validating this change.

Author: jennapederson

docs/lexical-search.ipynb

@@ -581,44 +581,7 @@
       },
       "source": [
         "\n",
-        "You may get fewer than top_k results if top_k is larger than the number of sparse vectors in your index that match your query. That is, any vectors where the dotproduct score is 0 will be discarded.\n",
-        "\n",
-        "Searching our financial headlines for the word \"banana\" will return zero results because our data doesn't include the term \"banana\" at all. For example:"
-      ]
-    },
-    {
-      "cell_type": "code",
-      "execution_count": 84,
-      "metadata": {
-        "colab": {
-          "base_uri": "https://localhost:8080/"
-        },
-        "id": "cEKqiufKmgL7",
-        "outputId": "b313d8a9-6cca-47c2-ed3d-d67d74ad4097"
-      },
-      "outputs": [
-        {
-          "name": "stdout",
-          "output_type": "stream",
-          "text": [
-            "No results found\n"
-          ]
-        }
-      ],
-      "source": [
-        "search_query = \"banana\"\n",
-        "\n",
-        "results = index.search(\n",
-        "    namespace=namespace,\n",
-        "    query={\n",
-        "        \"top_k\": 10,\n",
-        "        \"inputs\": {\n",
-        "            'text': search_query\n",
-        "        }\n",
-        "    }\n",
-        ")\n",
-        "\n",
-        "print_hits(results)"
+        "Note: You may get fewer than top_k results if top_k is larger than the number of sparse vectors in your index that match your query. That is, any vectors where the dotproduct score is 0 will be discarded."
       ]
     },
     {
@@ -661,7 +624,7 @@
     },
     "gpuClass": "standard",
     "kernelspec": {
-      "display_name": "Python 3 (ipykernel)",
+      "display_name": ".venv",
       "language": "python",
       "name": "python3"
     },
@@ -675,7 +638,7 @@
       "name": "python",
       "nbconvert_exporter": "python",
       "pygments_lexer": "ipython3",
-      "version": "3.11.9"
+      "version": "3.12.9"
     }
   },
   "nbformat": 4,