ci: remove useMtpRunner from build workflow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ncipollina

.github/workflows/build.yaml

@@ -19,7 +19,6 @@ jobs:
     uses: LayeredCraft/devops-templates/.github/workflows/package-build.yaml@v7.1
     with:
       hasTests: true
-      useMtpRunner: true
       dotnet-version: |
         8.0.x
         9.0.x