tofi: unmark broken on aarch64

When the tofi package was added, it didn't build on aarch64, but now
it does, presumably due to the GCC upgrade.

pkgs/applications/misc/tofi/default.nix

@@ -34,6 +34,5 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ fbergroth ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
   };
 }