Clear event System.Action list

I have a event System.Action in NetworkManager.cs like this:

 public static event Action connectedInternetEvent;

Then, I add callbreaks as:

 NetworkManager.connectedInternetEvent += InitializeNetwork;
 // many similar
 NetworkManager.connectedInternetEvent += SyncLocalShopTransaction;

Now, I want to clear all callbacks I need to the same as:

 NetworkManager.connectedInternetEvent -= InitializeNetwork;
 // many similar
 NetworkManager.connectedInternetEvent -= SyncLocalShopTransaction;

Is there a way to clear all like this?

 NetworkManager.connectedInternetEvent.Clear();