Exclude treefmt dev dependency from flake inputs

Lines 6 to 9 in 675143f

    
           treefmt-nix = { 
        
             url = "github:numtide/treefmt-nix"; 
        
             inputs.nixpkgs.follows = "nixpkgs"; 
        
           };

builtins.getFlake (
  builtins.flakeRefToString {
    type = "github";
    owner = "numtide";
    repo = "treefmt-nix";
    rev = "768acdb06968e53aa1ee8de207fd955335c754b7";
    narHash = "sha256-uru7JzOa33YlSRwf9sfXpJG+UAV+bnBEYMjrzKrQZFw=";
  }
)

	treefmt-nix = {
	url = "github:numtide/treefmt-nix";
	inputs.nixpkgs.follows = "nixpkgs";
	};