How do I withdraw funds from a liquidity pool?

To withdraw your funds, open the Pools section on STON.fi and select the position you previously added. You’ll see your share of the pool along with the current value of the tokens you can redeem. Choose how much liquidity you want to remove—either fully or partially. The interface will show the exact amounts of each token you’ll receive upon withdrawal. Confirm the action, then approve the transaction in your TON wallet. The pool burns your LP tokens and returns your underlying assets directly to your wallet. The withdrawal is final, and you stop earning swap fees once liquidity is removed.

See the link for more details.