This was earlier added to ensure LICENSE and NOTICE files are present in generated jars. In the earlier pom setup, hudi parent-pom was not linked to apache parent pom. There were no "generate-resource-bundle" plugin present in parent hudi pom to automatically generate LICENSE and NOTICE files in jars and we resorted to manually storing the LICENSE/NOTICE files in each submodule
With Apache parent pom, the NOTICE and LICENSE files are automatically setup for each jar added. This would mean that we can safely remove all LICENSE and NOTICE files in each submodules.