Remove SONAR_TOKEN and SONAR_HOST_URL from workflow

Removed environment variables for SonarQube analysis.

Author: egelhaus

.github/workflows/build-pr.yml

@@ -63,9 +63,6 @@ jobs:
       
       - name: SonarQube Analysis (Pull Request)
         uses: SonarSource/sonarqube-scan-action@v6
-        env:
-          SONAR_TOKEN: ${{ vars.SONAR_TOKEN }}
-          SONAR_HOST_URL: ${{ vars.SONAR_HOST_URL }}
         with: 
           args: >
             -Dsonar.projectVersion=${{ steps.get_version.outputs.tag }}