Revert "web: Updates to the Context and Tasks libraries from lit. (#7168)"

This reverts commit 15be83c06c.

web/src/elements/ak-locale-context/context.ts

@@ -0,0 +1,4 @@
+import { createContext } from "@lit-labs/context";
+
+export const localeContext = createContext<string>("locale");
+export default localeContext;