There’s no reason to import modules you don’t use; and every reason not to: doing so needlessly increases the load.
Noncompliant Code Example
import A from 'a'; // Noncompliant, A isn't used
import { B1 } from 'b';
console.log(B1);
Compliant Solution
import { B1 } from 'b';
console.log(B1);
