Updated checkout workflow version

.gitea/workflows/build.yml

@@ -8,7 +8,7 @@ jobs:
   docker-build:
     runs-on: linux_x64
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
       with:
         submodules: recursive
     - uses: satackey/action-docker-layer-caching@v0.0.11
@@ -20,8 +20,6 @@ jobs:
           docker-linux-static-          
     - name: install dependencies
       run: sudo apt -y install xvfb libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xkb1 libxcb-shape0 libxkbcommon-x11-0
-    - name: free up diskspace
-      run: ${{env.FREE_DISKSPACE}}
     - name: prepare build environment
       run: docker build --tag monero:build-env-linux --build-arg THREADS=3 --file Dockerfile.linux .
     - name: build