Remove Python-specific steps from workflows that no longer need them

Author: mbg

.github/actions/release-initialise/action.yml

@@ -25,17 +25,6 @@ runs:
       shell: bash
       run: npm ci
 
-    - name: Set up Python
-      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
-      with:
-        python-version: '3.12'
-
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install PyGithub==2.3.0 requests
-      shell: bash
-
     - name: Update git config
       run: |
         git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"

.github/workflows/post-release-mergeback.yml

@@ -51,9 +51,6 @@ jobs:
         with:
           node-version: 24
           cache: 'npm'
-      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
-        with:
-          python-version: '3.12'
 
       - name: Update git config
         run: |

.github/workflows/update-bundle.yml

@@ -40,11 +40,6 @@ jobs:
           git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --global user.name "github-actions[bot]"
 
-      - name: Set up Python
-        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
-        with:
-          python-version: '3.12'
-
       - name: Set up Node.js
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:

.github/workflows/update-supported-enterprise-server-versions.yml

@@ -22,11 +22,6 @@ jobs:
       pull-requests: write # needed to create pull request
 
     steps:
-      - name: Setup Python
-        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
-        with:
-          python-version: "3.13"
-
       - name: Checkout CodeQL Action
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1