docs: Remove ai-collab API docs from website nav (#24946)

Removes the `ai-collab` library from the list of package API
documentation we surface through the website sidebar. We are no longer
planning to support this experimental library, nor are we looking for
user feedback.

Author: Josmithr

docs/sidebars.ts

@@ -95,12 +95,6 @@ const sidebars: SidebarsConfig = {
 					items: [{ type: "autogenerated", dirName: "api/presence" }],
 					link: { type: "doc", id: "api/presence/index" },
 				},
-				{
-					type: "category",
-					label: "@fluidframework/ai-collab",
-					items: [{ type: "autogenerated", dirName: "api/ai-collab" }],
-					link: { type: "doc", id: "api/ai-collab/index" },
-				},
 			],
 			link: { type: "doc", id: "api/index" },
 		},

docs/versioned_sidebars/version-local-sidebars.json

@@ -39,12 +39,6 @@
 					"label": "@fluidframework/presence",
 					"items": [{ "type": "autogenerated", "dirName": "api/presence" }],
 					"link": { "type": "doc", "id": "api/presence/index" }
-				},
-				{
-					"type": "category",
-					"label": "@fluidframework/ai-collab",
-					"items": [{ "type": "autogenerated", "dirName": "api/ai-collab" }],
-					"link": { "type": "doc", "id": "api/ai-collab/index" }
 				}
 			],
 			"link": { "type": "doc", "id": "api/index" }