Revert "feat(amazonq): Prefetch next inline recommendation (#5290)"

[evanliu048]

This reverts commit 805cb39.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Description

In the previous change, we applied prefect to every responses. However, this introduced issues with inline completion, causing it to behave inconsistently and produce unexpected completions in the next response.

To mitigate this, this PR rolls back the responses prefect change to restore stable inline completion behavior.

Checklist

• My code follows the code style of this project
• I have added tests to cover my changes
• A short description of the change has been added to the CHANGELOG if the change is customer-facing in the IDE.
• I have added metrics for my changes (if required)

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.