[github-actions] remove code spell check (#12027)

Rely on AI-based code review tools instead.

.github/workflows/build.yml

@@ -89,29 +89,6 @@ jobs:
         reporter: github-pr-review
         fail_on_error: true
 
-  spell-check:
-    runs-on: ubuntu-24.04
-    steps:
-    - name: Harden Runner
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
-      with:
-        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
-
-    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      with:
-        submodules: true
-    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
-      with:
-        python-version: '3.12'
-        cache: pip
-    - name: Bootstrap
-      run: |
-          python -m pip install --upgrade pip
-          pip install --force-reinstall codespell==2.2.4
-    - name: Check
-      run: |
-        script/code-spell check
-
   cmake-version:
     runs-on: ubuntu-24.04
     steps: