feat: remove testing from claude.md as we do it with stop hooks now

CLAUDE.md

@@ -12,10 +12,6 @@ This is a NixOS infrastructure repository managing multiple hosts (servers and p
 # Enter development shell (sets up MCP configs)
 nix-shell
 
-# Test configuration before deployment (required before PRs)
-./scripts/test-configuration <hostname>
-./scripts/test-configuration -v <hostname>  # with --show-trace
-
 # Edit encrypted secrets
 nix-shell -p sops --run 'sops hosts/<hostname>/secrets.yaml'
 
@@ -80,17 +76,6 @@ utils/pkgs/<package-name>/
 └── (other files like patches, lock files)
 ```
 
-**IMPORTANT: When modifying a custom package** (patches, version updates, etc.), always test by building the package directly, not just running `test-configuration`. The configuration test only checks that the Nix expression evaluates, but doesn't verify the package actually builds:
-
-```bash
-# Build a custom package directly to verify it works
-nix-build -E 'with import <nixpkgs> { overlays = [ (import ./utils/overlays/packages.nix) ]; config.allowUnfree = true; }; <package-name>'
-```
-
-## Workflow
-
-Run `./scripts/test-configuration <hostname>` to verify NixOS configuration changes build successfully.
-
 ## Conventions
 
 - Nix files: two-space indentation, lower kebab-case naming