Delete row ('404', '20707') from daily_volatility

ticker_id 404
day 20707
implied_open 0.1412831200108491
implied_high 0.1412831200108491
implied_low 0.1301709645043779
implied_close 0.1333458660776554
historical_open 0.1523952755173204
historical_high 0.1523952755173204
historical_low 0.1523952755173204
historical_close 0.1523952755173204
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