test(xmpp): remove duplicate import in XMPPClient test file

Author: mremond

packages/fluux-sdk/src/core/XMPPClient.test.ts

@@ -24,7 +24,6 @@ import {
 } from './test-utils'
 import { VERIFY_CONNECTION_TIMEOUT_MS } from './modules/connectionTimeouts'
 import { _resetStorageScopeForTesting } from '../utils/storageScope'
-import { VERIFY_CONNECTION_TIMEOUT_MS } from './modules/connectionTimeouts'
 
 let mockXmppClientInstance: MockXmppClient