How to remove networks
All the networks you add are removable. Note that preloaded networks like Ethereum mainnet can't be removed.
- Extension
- Mobile
- Click on the menu in the top right and select 'Networks'.

- Find the network you want to remove and click the 3 dots next to it.

- Click 'Delete' to remove the network.
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Tap the gear icon in the tab bar to open settings.
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Find 'Networks' in the settings menu.
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You'll now see a list of the networks you've previously added to your MetaMask.
Press and hold on the network you want to remove, and then tap 'Remove' at the bottom of the screen.
If you need to re-add a network, just follow the instructions here. If you enabled testnets and don't want to see them anymore, just toggle it off in settings or the network menu. See here for instructions.