🔥 Remove Jina QA Bot as it has been discontinued (#840)

docs/overrides/main.html

@@ -1,31 +1 @@
 {% extends "base.html" %}
-{%- block scripts %}
-{{ super() }}
-<script src="https://cdn.jsdelivr.net/npm/qabot@0.4"></script>
-<script>
-    // This prevents the global search from interfering with qa-bot's internal text input.
-    document.addEventListener('DOMContentLoaded', () => {
-      document.querySelectorAll('qa-bot').forEach((x) => {
-        x.addEventListener('keydown', (event) => {
-          event.stopPropagation();
-        });
-      });
-    });
-</script>
-<qa-bot
-    server="https://tiangolo-sqlmodel.docsqa.jina.ai"
-    theme="infer"
-    title="SQLModel Bot"
-    description="SQLModel, SQL databases in Python, designed for simplicity, compatibility, and robustness."
-    style="font-size: 0.8rem"
->
-    <template>
-        <dl>
-            <dt>You can ask questions about SQLModel. Try:</dt>
-            <dd>Which Python version is supported?</dd>
-            <dd>How SQLModel interacts with the database?</dd>
-            <dd>How can I link tables?</dd>
-        </dl>
-    </template>
-</qa-bot>
-{%- endblock %}