Remove redundant inputs from dev/flake.nix
Summary
- Removes
flake-parts,nixpkgs, andtreefmt-nixfromdev/flake.nix— these are already in root and inherited by the partition viaextendModules - Only
gitlab-ci(dev-exclusive) remains indev/flake.nix - Removes explicit
treefmt-nix.flakeModuleandflake-parts.flakeModules.*imports fromnixica-dev.nixsince these are inherited from root
Ref: #11 (closed), !14 (merged)