Remove index no longer in use for unread_comment_count

Description

Remove any indexes acorss 'updated_at' field that are no longer in use for unread_comment_count.
Test removal of indexes under a load test.

Steps to Reproduce

None

Reason for Variance

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Release Notes

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Status

Assignee

Wajeeha Khalid

Reporter

Wajeeha Khalid

Labels

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Customer

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Partner Manager

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URL

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Contributor Name

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Groups with Read-Only Access

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Actual Points

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Sub-Team(s)

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Reach

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Impact

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Open edX Discourse Thread

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Platform Map Area (Levels 1 & 2)

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Platform Map Area (Levels 3 & 4)

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Story Points

0.5

Components

Priority

Unset
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