Revert "Copy "parent" fields alongside the "regular" fields."

This reverts commit b0f53aeabb7a38a1a677553e15f4d6ef205d33c3.

The given copyFields don't actually work, so let's drop 'em to avoid
confusion.
Merge pull request #8 from adam-vessey/7.x

Revert "Copy "parent" fields alongside the "regular" fields."