misc: Remove migration UI, warnings, and errors for changes pre-Cypress 10 (v15) (#31629)

* begin removing migration code

* remove migration query

* add back actions

* remove more migration references

* more migration removals

* remove call to migration

* remove gqp-Migration file

* updates to remove migration

* update type

* remove a lot more migration code - especially errors

* Remove other errors/warnins for versions before 10.x

* update error snapshots

* fix some tests

* index on remove-migration: 49fa75ab78 Merge branch 'remove-migration' of https://github.com/cypress-io/cypress into remove-migration

* index on remove-migration: 49fa75ab78 Merge branch 'remove-migration' of https://github.com/cypress-io/cypress into remove-migration

* index on remove-migration: 49fa75ab78 Merge branch 'remove-migration' of https://github.com/cypress-io/cypress into remove-migration

* remove more system tests and references

* fix call to refreshMetaState which was lost at initialization

* rearrange some system tests to not be dependent on migration

* update welcome version test

* fix wording of messaging

* skip irrelevant test

* fix failing assertion

* remove tests around cypress-plugin-retries

* Remove test from config_spec

* Remove screenshot from snapshot

* fix tests + remove more migration projects

* remove + update system tests

* remove + update system tests

* remove some invalid dev-server: start errors

* remove references and tests around pluginsFile which was removed

* remove some more invalid config examples

* Add changelog entry

* fix changelog link

* fix unit test

* index on remove-migration: 490ddb134c Merge branch 'release/15.0.0' into remove-migration

* index on remove-migration: 490ddb134c Merge branch 'release/15.0.0' into remove-migration

* index on remove-migration: 490ddb134c Merge branch 'release/15.0.0' into remove-migration

* run all binary/windows tests on this branch

* Update packages/scaffold-config/test/unit/detect.spec.ts

Co-authored-by: Bill Glesias <bglesias@gmail.com>

* Update packages/scaffold-config/test/unit/detect.spec.ts

Co-authored-by: Bill Glesias <bglesias@gmail.com>

---------

Co-authored-by: cypress-bot[bot] <+cypress-bot[bot]@users.noreply.github.com>
Co-authored-by: Bill Glesias <bglesias@gmail.com>

cli/CHANGELOG.md

@@ -18,6 +18,10 @@ _Released 07/01/2025 (PENDING)_
 
 - [`tsx`](https://tsx.is/) is now used in all cases to run the Cypress config, replacing [ts-node](https://github.com/TypeStrong/ts-node) for TypeScript and Node for commonjs/ESM. This should allow for more interoperability for users who are using any variant of ES Modules. Addresses [#8090](https://github.com/cypress-io/cypress/issues/8090), [#15724](https://github.com/cypress-io/cypress/issues/15724), [#21805](https://github.com/cypress-io/cypress/issues/21805), [#22273](https://github.com/cypress-io/cypress/issues/22273), [#22747](https://github.com/cypress-io/cypress/issues/22747), [#23141](https://github.com/cypress-io/cypress/issues/23141), [#25958](https://github.com/cypress-io/cypress/issues/25958), [#25959](https://github.com/cypress-io/cypress/issues/25959), [#26606](https://github.com/cypress-io/cypress/issues/26606), [#27359](https://github.com/cypress-io/cypress/issues/27359), [#27450](https://github.com/cypress-io/cypress/issues/27450), [#28442](https://github.com/cypress-io/cypress/issues/28442), [#30318](https://github.com/cypress-io/cypress/issues/30318), [#30718](https://github.com/cypress-io/cypress/issues/30718), [#30907](https://github.com/cypress-io/cypress/issues/30907), [#30915](https://github.com/cypress-io/cypress/issues/30915), [#30925](https://github.com/cypress-io/cypress/issues/30925), [#30954](https://github.com/cypress-io/cypress/issues/30954) and [#31185](https://github.com/cypress-io/cypress/issues/31185).
 
+**Misc:**
+
+- Migration helpers and related errors are no longer shown when upgrading from Cypress versions earlier than 10.0.0. To migrate from a pre-10.0.0 version, upgrade one major version at a time to receive the appropriate guidance. Addresses [#31345](https://github.com/cypress-io/cypress/issues/31345). Addressed in [https://github.com/cypress-io/cypress/pull/31629/](https://github.com/cypress-io/cypress/pull/31629/).
+
 ## 14.3.3
 
 _Released 5/6/2025_

cli/types/tests/plugins-config.ts

@@ -1,4 +1,4 @@
-// checking types passed to cypress/plugins/index.js file
+// checking types passed through setupNodeEvents
 
 // does nothing
 const pluginConfig: Cypress.PluginConfig = (on, config) => {}