ci: revert action caching, gitea cache backend not configured

setup-node and actions/cache@v4 hang trying to talk to a missing
cache server, adding 1-3min per step. Drop the cache: directives
and explicit cache blocks. Keep the single pip-download call in
build-dist-windows.sh which is independent of any cache backend.

.gitea/workflows/release.yml

@@ -105,7 +105,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
-          cache: 'npm'
 
       - name: Build frontend
         run: npm ci && npm run build
@@ -113,20 +112,6 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.11'
-          cache: 'pip'
-          cache-dependency-path: pyproject.toml
-
-      - name: Cache embedded Python
-        uses: actions/cache@v4
-        with:
-          path: build/python-embed.zip
-          key: python-embed-3.11.9
-
-      - name: Cache Windows wheels
-        uses: actions/cache@v4
-        with:
-          path: build/win-wheels
-          key: win-wheels-${{ hashFiles('build-dist-windows.sh', 'pyproject.toml') }}
 
       - name: Install build tools
         run: sudo apt-get update && sudo apt-get install -y --no-install-recommends nsis zip
@@ -194,7 +179,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
-          cache: 'npm'
 
       - name: Build frontend
         run: npm ci && npm run build
@@ -202,8 +186,6 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.11'
-          cache: 'pip'
-          cache-dependency-path: pyproject.toml
 
       - name: Build Linux distribution
         run: |