revert: free more disk space on github actions worker

.github/workflows/cd.yaml

@@ -3,18 +3,9 @@ on:
   pull_request:
   push:
 jobs:
-  tests:
+  CD:
     runs-on: ubuntu-latest
     steps:
-    - name: Maximize build space
-      uses: easimon/maximize-build-space@master
-      with:
-        root-reserve-mb: 512
-        swap-size-mb: 1024
-        remove-dotnet: 'true'
-        remove-android: 'true'
-        remove-haskell: 'true'
-        remove-docker-images: 'true'
     - uses: actions/checkout@v4
     - uses: cachix/install-nix-action@v25
       with: