chore: remove chats experiment (#18535)

site/src/contexts/useAgenticChat.ts

@@ -1,16 +0,0 @@
-import { experiments } from "api/queries/experiments";
-
-import { useEmbeddedMetadata } from "hooks/useEmbeddedMetadata";
-import { useQuery } from "react-query";
-
-interface AgenticChat {
-	readonly enabled: boolean;
-}
-
-export const useAgenticChat = (): AgenticChat => {
-	const { metadata } = useEmbeddedMetadata();
-	const enabledExperimentsQuery = useQuery(experiments(metadata.experiments));
-	return {
-		enabled: enabledExperimentsQuery.data?.includes("agentic-chat") ?? false,
-	};
-};