Remove orphan theme

[fditrapani]

Problem

When you go through the commerce variation of the DIFM flow, we show a single theme on a row. It looks so lonely:

Let's add Thriving artist.

Where

• Visit https://wordpress.com/website-design-service/?ref=themes#pricing-grid
• Select Express store

[github-actions]

OpenAI suggested the following labels for this issue:

• [Feature Group] Appearance & Themes: The issue addresses the visual aspect of the site by discussing themes, specifically the need to add a new theme.
• [Feature] Appearance & Themes: This feature label relates directly to the themes and their implementation in the WordPress environment.
• [Feature] DIFM (Do It For Me) Flows: The issue is tied to the DIFM flow, indicating a service aspect where themes are presented within a user flow.