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();

Alright, the answer is simply set it to null…

NetworkManager.connectedInternetEvent = null;