Update maven-pr-builder.yml

removed the if checking block for building Pull Requests as this was redundant code.

.github/workflows/maven-pr-builder.yml

@@ -49,9 +49,8 @@ jobs:
           ${{ runner.os }}-maven-
     # Some tests need screen access
     - name: Install xvfb
-      run: sudo apt-get install xvfb
+      run: sudo apt-get install -y xvfb
     # SonarQube scan does not work for forked repositories
     # See https://jira.sonarsource.com/browse/MMF-1371
     - name: Build with Maven
-      if: github.ref != 'refs/heads/master'
       run: xvfb-run mvn clean verify