Remove some workarounds for self-hosted arm64 runners

.github/workflows/go.yml

@@ -345,6 +345,7 @@ jobs:
     steps:
       # https://github.com/actions/checkout/issues/273#issuecomment-642908752 (see below)
       - name: "Pre: Fixup directories"
+        if: matrix.arch == 'arm'
         run: find . -type d -not -perm /u+w -exec chmod u+w '{}' \;
 
       - name: Check out code into the Go module directory
@@ -447,9 +448,9 @@ jobs:
       # post build action. So, as a workaround, ensure that all subdirectories
       # are writable.
       - name: "Post: Fixup directories"
-        if: always()
+        if: always() && matrix.arch == 'arm'
         run: find . -type d -not -perm /u+w -exec chmod u+w '{}' \;
 
       - name: "Docker prune"
-        if: always()
+        if: always() && matrix.arch == 'arm'
         run: docker system prune --force --filter "until=$((24*7))h"

.github/workflows/release.yml

@@ -222,14 +222,6 @@ jobs:
       SEGMENT_TOKEN: ${{ secrets.SEGMENT_WRITE_KEY_PROD }}
       EULA_NOTICE: ${{ secrets.EULA_NOTICE }}
     steps:
-      # https://github.com/actions/checkout/issues/273#issuecomment-642908752 (see below)
-      - name: "Pre: Fixup directories"
-        run: find . -type d -not -perm /u+w -exec chmod u+w '{}' \;
-
-      - name: Clean Docker before build
-        run: |
-          docker system prune --all --volumes --force
-
       - name: Check out code into the Go module directory
         uses: actions/checkout@v4
 
@@ -307,22 +299,6 @@ jobs:
           asset_name: k0s-airgap-bundle-${{ needs.release.outputs.tag_name }}-arm64
           asset_content_type: application/octet-stream
 
-      - name: Clean Docker after build
-        if: always()
-        run: |
-          docker system prune --all --volumes --force
-
-      # https://github.com/actions/checkout/issues/273#issuecomment-642908752
-      # Golang mod cache tends to set directories to read-only, which breaks any
-      # attempts to simply remove those directories. The `make clean-gocache`
-      # target takes care of this, but the mod cache can't be deleted here,
-      # since it shall be cached across builds, and caching takes place as a
-      # post build action. So, as a workaround, ensure that all subdirectories
-      # are writable.
-      - name: "Post: Fixup directories"
-        if: always()
-        run: find . -type d -not -perm /u+w -exec chmod u+w '{}' \;
-
   armv7:
     needs: release
     runs-on: [self-hosted, linux, arm]