Remove legacy field arguments and methods

[timleslie]

These arguments and methods related to the legacy Admin UI which is no longer needed.

[changeset-bot]

🦋 Changeset detected

Latest commit: dd29c43

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
@keystone-next/fields-legacy	Major
@keystone-next/fields-cloudinary-image-legacy	Major
@keystone-next/fields-auto-increment-legacy	Patch
@keystone-next/fields-mongoid-legacy	Patch
@keystone-next/api-tests-legacy	Patch
@keystone-next/benchmarks-legacy	Patch
@keystone-next/fields-document	Patch
@keystone-next/fields	Patch
@keystone-next/cloudinary	Patch

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