To remove “Showing the single result” in WooCommerce Shop/Category Page, just follow these steps:

Step 1. Install and Activate Code Snippets Plugin

Step 2. Add New Snippet

Step 3. Paste these code (Line 01)

If you use Storefront, use the above code (Lines 04 – 09)

Step 4. Save Changes and Activate

Snippet: Businessbloomer.com