Remove legacy default ID support

[timleslie]

This functionality is now handled by applyIdFieldDefaults.

[changeset-bot]

🦋 Changeset detected

Latest commit: c36f866

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

This PR includes changesets to release 9 packages

Name	Type
@keystone-next/adapter-prisma-legacy	Major
@keystone-next/fields-auto-increment-legacy	Major
@keystone-next/keystone-legacy	Major
@keystone-next/fields-legacy	Patch
@keystone-next/test-utils-legacy	Patch
@keystone-next/fields-document	Patch
@keystone-next/keystone	Patch
@keystone-next/fields	Patch
@keystone-next/benchmarks-legacy	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/keystonejs/keystone-next-docs/FRU45as7YbJrriHTbVYWUBdbKdbg
✅ Preview: https://keystone-next-git-remove-get-default-primary-key-config-899f4d.vercel.app

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit c36f866:

Sandbox	Source
@keystone-next/example-sandbox	Configuration