clean up a hint

[temaEmelyan]

Please make sure you consider the following:

• Add tests that use __typename in queries
• Does this change work with all nadel transformations (rename, type rename, hydration, etc)? Add tests for this.
• Is it worth using hints for this change in order to be able to enable a percentage rollout?
• Do we need to add integration tests for this change in the graphql gateway?
• Do we need a pollinator check for this?

[github-actions]

Test Results

  623 files  +  623    623 suites  +623   43s ⏱️ +43s
2 122 tests +2 122  1 569 ✅ +1 569  526 💤 +526  27 ❌ +27 
2 130 runs  +2 130  1 577 ✅ +1 577  526 💤 +526  27 ❌ +27 

For more details on these failures, see this check.

Results for commit 7099df8. ± Comparison against base commit 812c2dd.