fix(website): remove stale JS SDK version links from navbar dropdown

Remove hardcoded version links (1.3, 2.2) pointing to sdk.apify.com
and the duplicate version dropdown logic, keeping only the one from
docusaurus.config.js.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vdusek

website/src/theme/Navbar/Content/index.js

@@ -1,5 +1,4 @@
 import Link from '@docusaurus/Link';
-import { useLocation } from '@docusaurus/router';
 import { useThemeConfig } from '@docusaurus/theme-common';
 import {
     splitNavbarItems,
@@ -38,32 +37,10 @@ function NavbarContentLayout({ left, right }) {
     );
 }
 
-const VERSIONS_ITEM = {
-    type: 'docsVersionDropdown',
-    position: 'left',
-    label: 'Versions',
-    dropdownItemsAfter: [
-        {
-            href: 'https://sdk.apify.com/docs/guides/getting-started',
-            label: '2.2',
-        },
-        {
-            href: 'https://sdk.apify.com/docs/1.3.1/guides/getting-started',
-            label: '1.3',
-        },
-    ],
-    dropdownItemsBefore: [],
-};
-
 export default function NavbarContent() {
-    const location = useLocation();
     const mobileSidebar = useNavbarMobileSidebar();
     const items = useNavbarItems();
-    const effectiveItems = location.pathname?.endsWith('/python/')
-        || location.pathname?.endsWith('/python')
-        ? items
-        : [...items, VERSIONS_ITEM];
-    const [leftItems, rightItems] = splitNavbarItems(effectiveItems);
+    const [leftItems, rightItems] = splitNavbarItems(items);
     const searchBarItem = items.find((item) => item.type === 'search');
     return (
         <NavbarContentLayout