feat: remove legacy settings for MKTG urls

[Copilot]

What are the relevant tickets?

https://github.com/mitodl/hq/issues/12099

Description (What does it do?)

Removes the usage of legacy MKTG settings as per openedx/openedx-platform#38720

Testing

• Checkout this branch and set the theme
• Checkout feanil/depr_legacy_static branch in edx-platform.
• In edx-platform:

FEATURES["ENABLE_MKTG_SITE"] = True
ENABLE_MKTG_SITE = True
MKTG_URLS = {
    "ROOT": "https://learn.mit.edu"
}

MKTG_URL_LINK_MAP = {}
#
MKTG_URL_OVERRIDES = {
    "COURSES": "https://learn.mit.edu",
    # "PRIVACY": "https://learn.mit.edu/privacy/",
    "TOS": "https://learn.mit.edu/terms-of-service/",
    "ABOUT": "https://learn.mit.edu/about/",
    # "HONOR": "https://learn.mit.edu/honor/",
    "ACCESSIBILITY": "https://accessibility.mit.edu/",
    "CONTACT": "mailto:mitlearn-support@mit.edu",
    "TOS_AND_HONOR": "",
}
MIT_LEARN_SUPPORT_SITE_LINK = "https://support.learn.mit.edu/"

• Verify the legacy LMS pages have the links as per the above settings and they match the RC/Prod. There should be no impact.

[asadali145]

@copilot rebase this PR with main

[Copilot]

@copilot rebase this PR with main

Rebased onto main and pushed the updated branch at ea2f58c.

[Copilot]

Pull request overview

Removes unused legacy template imports and feature-flag variables from the unauthenticated navbar template, aligning the theme with the upstream removal of legacy MKTG settings.

Changes:

• Drop unused imports (reverse, text_type) from the template module section.
• Remove unused legacy feature-flag variable assignments (including ENABLE_MKTG_SITE) from the template context block.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[Anas12091101]

LGTM 👍

[Anas12091101]

We should merge this after Feanil's PR is merged: openedx/openedx-platform#38720.
Sorry, I meant to comment this on the ol-infra PR: mitodl/ol-infrastructure#5014