Update publish.yml

Author: hueifeng

.github/workflows/publish.yml

@@ -14,12 +14,6 @@ jobs:
         with:
           dotnet-version: '8.0.x'
           include-prerelease: true
-      - name: Ensure snowflake.png exists
-        run: |
-          if [ ! -f Snowflake/snowflake.png ]; then
-            echo "snowflake.png does not exist. Please add it to the Snowflake directory."
-            exit 1
-          fi
       - name: Build the project
         run: dotnet build -c Release Snowflake/Snowflake.csproj
       - name: Package the project