fixup! fixup! fixup! fixup! fix(cache): update cache with O(1) data structures

Author: bbatha

src/cache_test.ts

@@ -17,7 +17,6 @@ import { ADD, UPDATE, DELETE, ERROR, ListPromise, CHANGE } from './informer';
 use(chaiAsPromised);
 
 import { DefaultRequest, RequestResult, Watch } from './watch';
-import { getPriority } from 'os';
 
 // Object replacing real Request object in the test
 class FakeRequest extends EventEmitter implements RequestResult {