Not via the Shopify UI but if you export your customers, you can do what you want with tags etc in a spreadsheet.
Got you. As per your screenshot, go to the tab filter and then click that 'Saved' button top right and the option to 'Remove Tab' will appear. See my screenshot below.
User | Count |
---|---|
8 | |
6 | |
6 | |
5 | |
4 |