Fix new color alias

[mud]

Fixes #0000

Just bumped Blueprint core to 5.15.0 and noticed there was some duplicate to the color alias where the new values were being overridden by the old duplicated variables.

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

Remove the duplicate variables that use the old dark colors

Reviewers should focus on:

Screenshot

[changelog-app]

Generate changelog in packages/core/changelog/@unreleased

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• feature: A new feature of the service.
• improvement: An incremental improvement in the functionality or operation of the service.
• fix: Remedies the incorrect behaviour of a component of the service in a backwards-compatible way.
• break: Has the potential to break consumers of this service's API, inclusive of both Palantir services
  and external consumers of the service's API (e.g. customer-written software or integrations).
• deprecation: Advertises the intention to remove service functionality without any change to the
  operation of the service itself.
• manualTask: Requires the possibility of manual intervention (running a script, eyeballing configuration,
  performing database surgery, ...) at the time of upgrade for it to succeed.
• migration: A fully automatic upgrade migration task with no engineer input required.

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• ❗The break and manual task changelog types will result in a major release!
• 🐛 The fix changelog type will result in a minor release in most cases, and a patch release version for patch branches. This behaviour is configurable in autorelease.
• ✨ All others will result in a minor version release.

Type

• Feature
• Improvement
• Fix
• Break
• Deprecation
• Manual task
• Migration

Description

Remove duplicate variables which overrides new dark theme secondary and elevated colors with old values.

Check the box to generate changelog(s)

• Generate changelog entry

[svc-palantir-github]

Fix new color alias

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

[svc-palantir-github]

Add generated changelog entries

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

[ggdouglas]

Tracking that this links back to this comment and originally added in #6724

[mud]

Tracking that this links back to this comment and originally added in #6724

Gotcha, maybe having an inline comment suggesting the phased rollout would be useful since it currently looks like a bug.