chore(3p/chicago95): remove

This caused spurious fetching errors, and isn't used anywhere. Drop.

Change-Id: I338217b96d95e19084e7cba38270dd35f19c2b29
Reviewed-on: https://cl.snix.dev/c/snix/+/30543
Autosubmit: Florian Klink <flokli@flokli.de>
Tested-by: besadii
Reviewed-by: Ryan Lahfa <ryan@lahfa.xyz>

third_party/chicago95/default.nix

@@ -1,50 +0,0 @@
-# A rendition of everyone's favourite computer theme.
-{ pkgs, ... }:
-
-let
-  # Chicago95 has no GTK-4 theme (because GTK-4 removed important features that
-  # it needs), but there is a project with an approximation.
-  #
-  # This is a bit of a hack, but I inject that project's GTK-4 theme as if it
-  # was a part of Chicago95.
-  #
-  # This other project is GPL-3.0, under which Chicago95 is also distributed.
-  gtk4ProjectSrc = pkgs.fetchFromGitHub {
-    owner = "B00merang-Project";
-    repo = "Windows-95";
-    rev = "055abd7a3608afdcb2ef021732e07020f2b416b2";
-    hash = "sha256:1li6wzyn3y09d188xki1h96pmn4xcx2lklfc4rkiq2y2r22wx7kz";
-  };
-in
-pkgs.stdenvNoCC.mkDerivation {
-  pname = "Chicago95";
-  version = "master";
-
-  src = pkgs.fetchFromGitHub {
-    owner = "grassmunk";
-    repo = "Chicago95";
-    rev = "bdf5cf36a16102aaac297f3de887c601c2b1146f";
-    hash = "sha256:11fsy3bam1rhp1292zflvzmf1432z1p0ncwy3601wl2f8rnvfdfm";
-  };
-
-  # The project has a Makefile, but it's broken in all sorts of ways, so we just
-  # copy the important stuff manually.
-  dontBuild = true;
-  installPhase = ''
-    mkdir -p $out/share/{icons,fonts,themes,sounds,qt5ct/colors}
-
-    cp -r Theme/Chicago95 $out/share/themes
-    cp -r Icons/* $out/share/icons
-    cp -r Cursors/* $out/share/icons
-    cp -r Fonts/* $out/share/fonts
-    cp Extras/Chicago95_qt.conf $out/share/qt5ct/colors
-
-    cp -r ${gtk4ProjectSrc}/gtk-4.0 $out/share/themes/Chicago95
-  '';
-
-  # TODO(tazjin): investigate various broken symlinks in $out/share/icons
-  dontCheckForBrokenSymlinks = true;
-
-  meta.license = pkgs.lib.licenses.gpl3;
-}
-