chore(bzlmod): assume that we can always mark the extension as reproducible

[aignas]

As part of the previous bazel 6 and bazel 7 support cleanup, we probably should
have done this as well. All of the supported bazel versions allow us to mark
the extension as reproducible.

[gemini-code-assist]

Summary of Changes

Hello @aignas, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request streamlines the pip module extension for bzlmod by removing a redundant conditional check for the reproducible flag in extension_metadata. This change is based on the understanding that all currently supported Bazel versions inherently support marking extensions as reproducible, thus simplifying the codebase and aligning it with previous Bazel 6 and 7 support cleanups.

Highlights

• Code Simplification: The conditional check for extension_metadata_has_reproducible within the _pip_impl function has been removed, simplifying the logic.
• Dependency Removal: The bazel_features module is no longer loaded, as its functionality related to reproducible metadata is now assumed to be universally available across supported Bazel versions.
• Reproducibility Assumption: The pip module extension now unconditionally marks itself as reproducible, reflecting that all supported Bazel versions allow this behavior.

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[gemini-code-assist]

Code Review

This pull request simplifies the bzlmod extension by removing a check for the extension_metadata_has_reproducible feature, which is now present in all supported Bazel versions. The change is correct and makes the code cleaner. I've added one suggestion to preserve a comment that explains why the extension is marked as reproducible, which I believe is useful for future maintenance.

[gemini-code-assist]

This change simplifies the logic correctly. However, the removed code contained a useful comment explaining why the extension is marked as reproducible. It would be beneficial for future maintainability to preserve this context. Consider adding a comment to explain the reasoning.

Suggested change

	return module_ctx.extension_metadata(
	reproducible = True,
	)
	return module_ctx.extension_metadata( # PyPI index results are reproducible
	reproducible = True,
	)