Please add goals to remove sources and resources.

It would be great, if the build-helper plugin would support removing (re)sources just like it supports adding them.

remove-source
remove-test-source
remove-resource
remove-test-resource

This would be useful to workaround plugins which do not support configuration of the source roots or resources and will add to the wrong source roots when used in a non-default phase. The JAXB2 plugin, for example, does not support generating code during the generate-test-sources phase, since it will add its output directory to the compile source roots. Using the build-helper plugin, it already is possible to add that output directory to the test compile source roots and use the JAXB2 plugin during the generate-test-sources phase, but then still the output directory is added to the compile source roots and test classes are visible to the javadoc plugin, for example. The build-helper plugin could be used to add a directory to the test source roots and to remove that same directory from the compile source roots.