Enabling UnityAds for my project adds two useless textures to the game

I've enabled UnityAds for my project and it increased by build size by 16mb because of adding two textures that should be used in editor only.

Code (csharp):

1. Used Assets and files from the Resources folder, sorted by uncompressed size:
2.  8.0 mb     1.0% Packages/com.unity.ads/Editor/Resources/Editor/landscape.jpg
3.  8.0 mb     1.0% Packages/com.unity.ads/Editor/Resources/Editor/portrait.jpg
4.  4.0 mb     0.5% Built-in Texture2D: sactx-1024x1024-Uncompressed-Sprites-d37c6e12

Is it a bug or a intended behaviour? How can I workaround that?

 

@DenisasK Unity 2018.2.14f1.
And a part of manifest.json

Code (csharp):

1.  
2. {
3.   "dependencies": {
4.     "com.unity.ads": "2.0.8",
5.     "com.unity.analytics": "2.0.16"

 

Thanks, I'll try it