Change record status: 
Project: 
Introduced in branch: 
8.0.x
Introduced in version: 
8.0.0-alpha1
Description: 

In D7 the file icons were printed as part of the file field template:
<span{{ attributes }}>{{ icon }} {{ link }}</span>

The icon template variable has been removed and instead the icons are being added using CSS in:

.file--general {
  background-image: url(../icons/application-octet-stream.png);
}

If you want to overwrite these icons with your own, you can copy the CSS and point the background image to your chosen icons.

If you want to remove the icons completely, remove the stylesheet: file.formatter.generic.css

Impacts: 
Module developers
Themers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done