[OE-core] Is HOSTTOOLS_WHITELIST_GPL-3.0 ever used?

[Andre McCurdy]

Support for HOSTTOOLS_WHITELIST_GPL-3.0 (originally named
GPLv3_HOSTTOOLS_WHITELIST) was first added here:

  http://git.openembedded.org/openembedded-core/commit/?id=179e056519c5ad761b2d942d7196664874c155e4

The implementation in base.bbclass has been tweaked a few times since
then, but even in the original, it looks like license checking was
skipped for native recipes (and anything else which could be described
as a "host tool"), so providing a whitelist of specific host tools
looks redundant. The current version does the same.

Does anyone know how HOSTTOOLS_WHITELIST_GPL-3.0 is intended to be
used or when it might be necessary?

Any objections to a patch to remove it?