fix workflow: remove github dependency + duplicate scan

.gitea/workflows/sonar-scan.yml

@@ -36,14 +36,6 @@ jobs:
           dotnet --version
         shell: pwsh
 
-      - name: Install OWASP Dependency Check
-        run: |
-          # 下载 11.0.0 版本（修复 SAFETY 枚举问题）
-          Invoke-WebRequest -Uri "https://github.com/jeremylong/DependencyCheck/releases/download/v${env:DC_VERSION}/dependency-check-${env:DC_VERSION}-release.zip" -OutFile "dc.zip" -UseBasicParsing
-          Expand-Archive -Path "dc.zip" -DestinationPath "./dc" -Force
-          echo "$(Get-Location)/dc/dependency-check/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-        shell: pwsh
-
       - name: Run OWASP Dependency Check
         run: |
           New-Item -Path $env:DC_OUTPUT -ItemType Directory -Force