Auto merge of #2477 - tarcieri:remove-noise-from-background, r=Turbo87

styles: use flat color for background (removes noise.png)

Personally I think it looks better with a flat green color instead of the `noise.png` image overlay.

Before:

<img width="1263" alt="Screen Shot 2020-04-30 at 7 47 38 AM" src="https://user-images.githubusercontent.com/797/80724679-fb1ec480-8ab6-11ea-9030-212f8d0860c0.png">

After:

<img width="1264" alt="Screen Shot 2020-04-30 at 7 47 25 AM" src="https://user-images.githubusercontent.com/797/80724697-ff4ae200-8ab6-11ea-9b01-074cfbb3b55f.png">

Author: bors

app/styles/application.module.css

@@ -14,7 +14,6 @@
 }
 
 html {
-    background: url('/assets/noise.png');
     background-color: #3b6837;
 }