diff --git a/.github/workflows/scripts/setup.sh b/.github/workflows/scripts/setup.sh
deleted file mode 100755
index 797a9ed..0000000
--- a/.github/workflows/scripts/setup.sh
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/usr/bin/env bash
-
-set -eu
-
-id
-
-df -h
-
-sudo systemd-run --wait rm -rf \
-     /usr/share/az* \
-     /usr/share/dotnet \
-     /usr/share/gradle* \
-     /usr/share/miniconda \
-     /usr/share/swift \
-     /var/lib/gems \
-     /var/lib/mysql \
-     /var/lib/snapd \
-     /opt/hostedtoolcache/CodeQL \
-     /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk
-
-sudo fstrim /
-
-df -h
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 3596917..86fd999 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -65,9 +65,6 @@ jobs:
     - uses: actions/checkout@v1
     - uses: actions/setup-go@v5
 
-    - name: Setup
-      run: .github/workflows/scripts/setup.sh
-
     - name: Build
       run: go build
 
@@ -141,38 +138,9 @@ jobs:
           ]
 
     steps:
-      - name: Backup docker files
-        run: |
-          echo "backup moby/buildkit image"
-          sudo docker image save -o ${GITHUB_WORKSPACE}/images.tar moby/buildkit
-          echo "prune docker"
-          sudo docker system prune -a -f
-          echo "back up /var/lib/docker folder structure and other files"
-          sudo rsync -aPq /var/lib/docker/ ${GITHUB_WORKSPACE}/docker
-
-      - name: Maximize build space
-        uses: easimon/maximize-build-space@master
-        with:
-          overprovision-lvm: 'true'
-          remove-dotnet: 'true'
-          # instead of using default value to mount to build path,
-          # /var/lib/docker/ is really the place we need more spaces.
-          build-mount-path: '/var/lib/docker/'
-
-      - name: Restore docker files
-        run: |
-          sudo rsync -aPq ${GITHUB_WORKSPACE}/docker/ /var/lib/docker
-          sudo rm -rf ${GITHUB_WORKSPACE}/docker
-          sudo ls ${GITHUB_WORKSPACE} -l
-          sudo docker image load -i ${GITHUB_WORKSPACE}/images.tar
-          sudo rm ${GITHUB_WORKSPACE}/images.tar
-
       - uses: actions/checkout@v1
       - uses: actions/setup-go@v5
 
-      - name: Setup
-        run: .github/workflows/scripts/setup.sh
-
       - name: Build
         run: go build