Remove redundant license:check step that overwrites Maven Timeline

The license-maven-plugin is already bound to process-sources phase in pom.xml,
so mvn verify already runs it. The separate mvn license:check step was
overwriting target/timeline/ with only its own data.

Author: jeanbisutti

.github/workflows/CI.yml

@@ -25,8 +25,6 @@ jobs:
         cache: 'maven'
     - name: Execute tests
       run: mvn verify -Dmaven.profile
-    - name: check license header is present in all files
-      run: mvn license:check
     - name: Upload Maven Timeline
       if: always()
       uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4