Qual: Optimize/explain workflows

# Qual: Optimize/explain workflows

phpstan checkout took about 1.5 minutes, while pre-commit only takes 10s.
So I removed the option to the checkout option which likely makes
the difference.

I removed the IMHO useless step of installing node - it may have been
useful during setting up the workflow, but not now.

I commented on the pre-commit workflow.

.github/workflows/phpstan.yml

@@ -25,8 +25,6 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v4
-        with:
-         fetch-depth: 0
 
       # Get PHP and addons
       - name: Setup PHP
@@ -36,11 +34,6 @@ jobs:
           php-version: "${{ matrix.php-version }}"
           tools: phpstan, cs2pr
           extensions: calendar, json, imagick, gd, zip, mbstring, intl, opcache, imap, mysql, pgsql, sqlite3, ldap, xml, mcrypt
-      # ???
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 14.x
-          registry-url: 'https://registry.npmjs.org'
 
       # Restore old cache
       - name: Restore phpstan cache

.github/workflows/pre-commit.yml

@@ -16,7 +16,8 @@ jobs:
         if: false
       # Checkout git sources to analyze
       - uses: actions/checkout@v4
-      # ???
+      # Action setup-python needs a requirements.txt or pyproject.toml
+      # This ensures one of them exists.
       - name: Create requirements.txt if no requirements.txt or pyproject.toml
         run: |-
           [ -r requirements.txt ] || [ -r pyproject.toml ] || touch requirements.txt
@@ -31,7 +32,8 @@ jobs:
         with:
           path: ~/.cache/pre-commit/
           key: pre-commit-4|${{ env.pythonLocation }}|${{ hashFiles('.pre-commit-config.yaml') }}
-      # Run all the precommit tools (defined into pre-commit-config.yaml). We can force exclusion of some of them here.
+      # Run all the precommit tools (defined into pre-commit-config.yaml).
+      # We can force exclusion of some of them here.
       - name: Run pre-commit hooks
         env:
           # SKIP is used by pre-commit to not execute certain hooks