[action] Fix yocto build workflow

- Add an option `nobranch=1` to prevent occasional fetch error.
- Remove unnecessary disk space acquisition step.

Signed-off-by: Yongjoo Ahn <[email protected]>

.github/workflows/yocto.yml

@@ -34,18 +34,6 @@ jobs:
           /var/cache/yocto/sstate-cache
           /var/cache/yocto/persistent
         key: yocto-cache-yocto-5.0.3
-    - name: acquire some disk space
-      run: |
-          df -h
-          sudo apt-get update --fix-missing \
-            && sudo apt-get remove -y '^dotnet-.*' '^llvm-.*' '^mysql-server-core-.*' '^postgresql-.*' \
-            azure-cli google-chrome-stable google-cloud-cli firefox powershell microsoft-edge-stable mono-devel \
-            && sudo apt-get purge docker-ce docker-ce-cli \
-            && sudo apt-get autoremove -y \
-            && sudo rm -rf /usr/share/dotnet /usr/share/swift /usr/share/miniconda /usr/local/graalvm \
-              /usr/local/.ghcup /usr/local/share/powershell /usr/local/share/chromium /usr/local/lib/node_modules \
-              /var/lib/docker /var/lib/apt/lists
-          df -h
     - name: build
       if: github.ref == 'refs/heads/main' || env.rebuild == '1'
       run: |
@@ -59,7 +47,7 @@ jobs:
         echo "::group::Prepare poky and meta-neural-network"
         git clone git://git.yoctoproject.org/poky -b yocto-5.0.3 && cd poky
         git clone https://github.com/nnstreamer/meta-neural-network -b scarthgap
-        echo 'SRC_URI = "git://${{ github.workspace }};protocol=file;usehead=1"' >> meta-neural-network/recipes-nnstreamer/nnstreamer/nnstreamer_%.bbappend
+        echo 'SRC_URI = "git://${{ github.workspace }}/;protocol=file;usehead=1;nobranch=1"' >> meta-neural-network/recipes-nnstreamer/nnstreamer/nnstreamer_%.bbappend
         source oe-init-build-env
         bitbake-layers add-layer ../meta-neural-network
         echo "::endgroup::"