Merge pull request #127 from samueldr/fix/contributors-licensing-old-logo

Mainly removes old logo sightings

Author: samueldr

CONTRIBUTORS.md

@@ -8,13 +8,6 @@ directory.
 Unless otherwise noted, contributions are shared under the license of this
 repository.
 
-## @cillianderoiste
-
-  * No specific license, all rights reserved @cillianderoiste. PR #10
-      * `swag/flyers/happier-hacking/flyer-multi.pdf`
-      * `swag/flyers/happier-hacking/flyer-optimized.svg`
-      * `swag/flyers/happier-hacking/Readme.md`
-
 ## @intergrav
 
   * CC BY-SA 4.0
@@ -34,24 +27,6 @@ repository.
       * `wallpapers/nix-wallpaper-stripes-logo.png`
       * `wallpapers/nix-wallpaper-stripes.png`
 
-## @jagajaga
-
-  * [Upstream](https://github.com/jagajaga/nixos-slim-theme), MIT.
-      * `slim/themes/nixos-theme.tar.gz`
-  * No specific license, all rights reserved @jagajaga. PR #2
-      * `grub-background/grub-1.xpm`
-
-## @lethalman
-
-  * No specific license, all rights reserved @lethalman. Issue #1
-      * `gnome/Gnome_Dark.png`
-      * `gnome/share/backgrounds/gnome/Gnome_Dark.jpg`
-  * No specified liense, upstream wallpaper is GPL, modification by @lethalman. Assumed to be GPL. Commit b1c912ad918c256c7ebf2f5c2960a66cbc58570a
-	  * [Original by ivan-cukic](https://ivan-cukic.deviantart.com/art/KDE-Stripes-175023606)
-	  * [Contributed to the KDE project](https://github.com/KDE/kde-workspace/commit/bbd0bc62c7cbb074783af01086602c4de03fe8ac) as [GPL](https://github.com/KDE/kde-workspace/blob/bbd0bc62c7cbb074783af01086602c4de03fe8ac/COPYING)
-      * `kde/share/wallpapers/nixos-stripes/nixos-stripes.png`
-      * `kde/share/wallpapers/nixos-stripes/nixos-stripes.xcf`
-
 ## @MultisampledNight
 
   * CC BY-SA 4.0
@@ -78,18 +53,6 @@ repository.
   * CC BY-SA 4.0 (by nixos-artwork)
       * `wallpapers/nix-wallpaper-nineish-solarized-*`
 
-## @robberer
-
-  * No specific license, all rights reserved @robberer. PR #5
-      * `common/wallpapers/nixos-border.png`
-  * No specific license, all rights reserved @robberer. PR #4
-      * `common/grub2-background/grub-nixos-1.png`
-      * `common/grub2-background/grub-nixos-1.xcf`
-      * `common/grub2-background/grub-nixos-2.png`
-      * `common/grub2-background/grub-nixos-2.xcf`
-      * `common/grub2-background/grub-nixos-3.png`
-      * `common/grub2-background/grub-nixos-3.xcf`
-
 ## @samueldr
 
   * CC BY-SA 4.0 (by nixos-artwork), with Breeze Icons under LGPL.