To remove unneeded themes in WordPress, you can follow these steps:
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Log in to your WordPress dashboard using your admin credentials.
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Once you're logged in, navigate to the "Appearance" section on the left-hand side of the dashboard menu and click on "Themes."
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In the Themes section, you'll see a list of installed themes. The currently active theme will be indicated by a blue border around its thumbnail.
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Identify the themes that you want to remove. Make sure you only remove themes that you are certain are not in use or needed anymore. Removing the active theme can cause your website to break or become inaccessible.
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Hover your mouse over the theme you want to remove, and you'll see a "Theme Details" button and a "Delete" link. Click on the "Theme Details" button to get more information about the theme if needed.
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If you are sure you want to remove the theme, click on the "Delete" link. A confirmation message will appear asking if you're sure you want to delete the theme. Click on "OK" to proceed.
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WordPress will remove the theme from your website. The theme's files, as well as any associated data or settings, will be deleted.
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Repeat the process for any other unneeded themes you want to remove.
It's generally a good practice to keep your WordPress installation clean and remove themes that are not in use. This helps to improve your website's performance and reduces potential security risks. However, be cautious when deleting themes, especially if they are currently active, as it can impact your website's appearance and functionality.