Remove deprecated, old, unused GridColumnPicker

Spotted by Joseph Lewis in LP #804462.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Bill Erickson <berick@esilibrary.com>
LP#867691: Authority match sets are not working

Authority match sets are not supported so hide the option for now.
It's confusing having it there.

[with minor conflict resolution]

Signed-off-by: Mark Cooper <markchristophercooper@gmail.com>
Signed-off-by: Bill Erickson <berick@esilibrary.com>