Remove PointAnnotation(marker) from maps iOS

Question

I'm using Mapbox Maps(v10.7.0) in my app, two things I want to achieve

1. Remove all markers (PointAnnotation)

2. Drag a marker and drop in another location

        let pointAnnotationManager = mapView.annotations.makePointAnnotationManager()
        pointAnnotationManager?.annotations.removeAll()
   

Tried above code to remove marker, but it's not removing any... How to achieve this...