Do not use Free Disk Space action in Unit Tests. (#13601)

Signed-off-by: Satadru Pramanik <satadru@gmail.com>

.github/workflows/Unit-Test.yml

@@ -37,22 +37,6 @@ jobs:
       group: ${{ matrix.arch }}-${{ github.workflow }}-${{ github.ref }}-${{ github.sha }}
       cancel-in-progress: true
     steps:
-      - name: Free Disk Space (Ubuntu)
-        uses: BRAINSia/free-disk-space@v2
-        with:
-          # this might remove tools that are actually needed,
-          # if set to "true" but frees about 6 GB
-          tool-cache: false
-
-          # all of these default to true, but feel free to set to
-          # "false" if necessary for your workflow
-          mandb: true
-          android: true
-          dotnet: true
-          haskell: true
-          large-packages: true
-          docker-images: true
-          swap-storage: true
       - uses: actions/checkout@v5
         with:
           persist-credentials: true