To add to Fares' response, the error comes from not providing all Custom Type schemas. All Custom Types, including deleted Custom Types that have been used at least once, must be provided.
Since you are no longer using the Custom Types you deleted, you may provide the schema as an empty object like this in
// Example plugin configuration
The plugin queries the Prismic REST API for a list of all Custom Types for the repository. This includes currently used types as well as any deleted types that have been used at least once. The plugin uses this list to verify that all Custom Type schemas have been provided.
This has the side-effect of requiring the empty object for deleted types, but also ensures all the types you are using are provided.
I hope that helps!