how to remove com.google.android.gms:play-services-ads-identifier:17.0.0@aar from external libraries of project in android studio

I have removed --> implementation 'com.google.android.gms:play-services-ads-identifier:11.4.0' dependency from build.gradle and also excluded it from all other dependencies present in project, but still getting com.google.android.gms:play-services-ads-identifier:17.0.0@aar in external libraries of project. I want to remove this sdk permanently but I am not able to do so, please provide me some solution for this.