refactor(pre-commit): remove experimental features flags

Flags are no longer needed once /etc/nix/nix.conf is configured
with experimental-features via nix-darwin or manually.

To enable globally, run one of:
1. nixswitch (applies nix-darwin config)
2. echo 'experimental-features = nix-command flakes' | sudo tee /etc/nix/nix.conf

Author: svnlto

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
 
       - id: flake-check
         name: Validate flake
-        entry: bash -c 'nix flake check --no-build --extra-experimental-features "nix-command flakes"'
+        entry: bash -c 'nix flake check --no-build '
         language: system
         files: \.nix$
         pass_filenames: false