fix(CI): update check_stub_parity command to include --no-project flag and remove unnecessary targets

Author: krypton-byte

.github/workflows/CI.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Ruff format check
         run: uv run --no-project --with ruff==0.11.4 ruff format --check .
       - name: Validate stub parity
-        run: uv run python scripts/check_stub_parity.py
+        run: uv run --no-project python scripts/check_stub_parity.py
 
   linux:
     name: Linux manylinux wheels
@@ -53,10 +53,6 @@ jobs:
             target: aarch64
           - runner: ubuntu-22.04
             target: armv7
-          - runner: ubuntu-22.04
-            target: s390x
-          - runner: ubuntu-22.04
-            target: ppc64le
     steps:
       - uses: actions/checkout@v4
         with: