There is an option to add an action to your character via 'Manage Custom Action'.

Does anyone know is there an option to remove an existing action from your character?

Thank you for your help.

No.

What action are you wanting to remove?

I want to remove Wild Shape Action the Druid gets on level 2

Nope. That one is pretty much untouchable. If it was a subclass feature, I was going to suggest homebrewing the subclass.

The reason I am trying to remove it is making a homebrew class.

In the end it doesn't really bother me, but I would like to be able to at least hide it from sharacter sheer or something. 

thanks for the help