Remove cachix install step from ihp-new

[mpscholten]

With the new flake based dev env we don't need to install cachix anymore to add the digitallyinduced binary cache. So the step here can be removed https://github.com/digitallyinduced/ihp/blob/master/ProjectGenerator/bin/ihp-new#L219

[rvarun11]

Apart from removing cachix install step, do we need:

ihp/ProjectGenerator/bin/ihp-new

Line 237 in 33df9f4

if ! grep -s -q "digitallyinduced.cachix.org-1:y+wQvrnxQ+PdEsCt91rmvv39qRCYzEgGQaldK26hCKE=" ~/.config/nix/nix.conf; then

Or can this be removed as well?

[mpscholten]

Yes very likely