The Newsletter widget will exist, by default, in different pages of your EvolutionX system.
Here is how to remove them in three easy steps!
Go into Appearance > Layouts. Below are the default layouts in EvolutionX, so you may need to click in each of these, to locate the widget.
2. Once you click on a layout (eg. Home Page), hit the "Show Top Bottom Container" button.
3. The widget is located in the bottom container. Click on "Edit" - and then Remove!