Remove repeated line in Merge Queue configs (#11188)

# What Does This Do

Remove repeated line in Merge Queue configs

# Motivation

# Additional Notes

# Contributor Checklist

- Format the title according to [the contribution guidelines](https://github.com/DataDog/dd-trace-java/blob/master/CONTRIBUTING.md#title-format)
- Assign the `type:` and (`comp:` or `inst:`) labels in addition to [any other useful labels](https://github.com/DataDog/dd-trace-java/blob/master/CONTRIBUTING.md#labels)
- Avoid using `close`, `fix`, or [any linking keywords](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword) when referencing an issue  
  Use `solves` instead, and assign the PR [milestone](https://github.com/DataDog/dd-trace-java/milestones) to the issue
- Update the [CODEOWNERS](https://github.com/DataDog/dd-trace-java/blob/master/.github/CODEOWNERS) file on source file addition, migration, or deletion
- Update [public documentation](https://docs.datadoghq.com/tracing/trace_collection/library_config/java/) with any new configuration flags or behaviors

Jira ticket: [PROJ-IDENT]

***Note:*** **Once your PR is ready to merge, add it to the merge queue by commenting `/merge`.** `/merge -c` cancels the queue request. `/merge -f --reason "reason"` skips all merge queue checks; please use this judiciously, as some checks do not run at the PR-level. For more information, see [this doc](https://datadoghq.atlassian.net/wiki/spaces/DEVX/pages/3121612126/MergeQueue).

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Co-authored-by: sarah.chen <sarah.chen@datadoghq.com>

Author: sarahchen6

repository.datadog.yaml

@@ -10,7 +10,6 @@ merge_method: squash
 gitlab_check_enable: true
 # Do not add merge queue status labels on the PR - they may cause race condition errors with existing label checks
 skip_labels: true
-gitlab_check_enable: true
 branches:
   master:
     allow_skip_checks: true