Remove tests.binaryTarball

This test no longer works on Hydra because import-from-derivation is
no longer allowed.

flake.nix

@@ -388,38 +388,6 @@
               inherit (self) overlay;
             });
 
-        # Test whether the binary tarball works in an Ubuntu system.
-        tests.binaryTarball =
-          with nixpkgsFor.x86_64-linux;
-          vmTools.runInLinuxImage (runCommand "nix-binary-tarball-test"
-            { diskImage = vmTools.diskImages.ubuntu1204x86_64;
-            }
-            ''
-              set -x
-              useradd -m alice
-              su - alice -c 'tar xf ${self.hydraJobs.binaryTarball.x86_64-linux}/*.tar.*'
-              mkdir /dest-nix
-              mount -o bind /dest-nix /nix # Provide a writable /nix.
-              chown alice /nix
-              su - alice -c '_NIX_INSTALLER_TEST=1 ./nix-*/install'
-              su - alice -c 'nix-store --verify'
-              su - alice -c 'PAGER= nix-store -qR ${self.hydraJobs.build.x86_64-linux}'
-
-              # Check whether 'nix upgrade-nix' works.
-              cat > /tmp/paths.nix <<EOF
-              {
-                x86_64-linux = "${self.hydraJobs.build.x86_64-linux}";
-              }
-              EOF
-              su - alice -c 'nix --experimental-features nix-command upgrade-nix -vvv --nix-store-paths-url file:///tmp/paths.nix'
-              (! [ -L /home/alice/.profile-1-link ])
-              su - alice -c 'PAGER= nix-store -qR ${self.hydraJobs.build.x86_64-linux}'
-
-              mkdir -p $out/nix-support
-              touch $out/nix-support/hydra-build-products
-              umount /nix
-            '');
-
         /*
         # Check whether we can still evaluate all of Nixpkgs.
         tests.evalNixpkgs =