How Do I Remove All Extra Lighting From The Scene?

Unity Engine
1

I have unity 5, the recreational version.

I saw this really cool effect on youtube, and I wanted to try and replicate it in Unity!

However, even after I removed the directional light, light still is lighting up my image. How do I remove this extra light?

[Album] imgur.com
2

Lighting settings → environment light + environment reflections.

if you turn down both to 0 you will get a perfectly dark scene.