Fix import statement

The npm: specifier is not needed since its in our deno.json

Author: philc

tests/unit_tests/vomnibar_test.js

@@ -1,6 +1,6 @@
 import { assert, context, setup, should, stub, teardown } from "../vendor/shoulda.js";
 import * as shoulda from "../vendor/shoulda.js";
-import * as jsdom from "npm:jsdom";
+import * as jsdom from "jsdom";
 import "../../tests/unit_tests/test_chrome_stubs.js";
 import "../../background_scripts/completion.js";
 import { Vomnibar } from "../../pages/vomnibar.js";