printSchemaWithDirectives always prints subscription on schema

[jdolle]

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---

Describe the bug

Given the following schema:

schema {
  query: Query
  mutation: Mutation
  subscription: Subscription
}

type Query {
  foo: Boolean
}

pruneSchema should remove the mutation and subscription from the root schema object:

schema {
  query: Query
}

type Query {
  foo: Boolean
}

To Reproduce Steps to reproduce the behavior:

Expected behavior

Environment:

• OS:
• @graphql-tools/...:
• NodeJS:

Additional context

[jdolle]

After some more testing, I found it was printSchemaWithDirectives that was adding the subscription.