message: update customer.ts file
diff: @@ -3,7 +3,6 @@ import { Log } from '@microsoft/sp-core-library';
  import {
  BaseApplicationCustomizer
  } from '@microsoft/sp-application-base';
  -import { Dialog } from '@microsoft/sp-dialog';
  import * as strings from 'AppInsightsApplicationCustomizerStrings';
  import { ApplicationInsights } from '@microsoft/applicationinsights-web'
  @@ -46,13 +45,6 @@ export default class AppInsightsApplicationCustomizer
  appInsights.addTelemetryInitializer(telemetryInitializer);
  appInsights.trackPageView();
  - let message: string = this.properties.instrumentationKey;
  - if (!message) {
  - message = '(No properties were provided.)';
  - }
  -
  - Dialog.alert(`Hello from ${strings.Title} - 1:\n\n${message}`);
  -
  return Promise.resolve();
  }
  }
  