Delete row ('2757', '20000') from daily_volatility

ticker_id 2757
day 20000
implied_open 0.1920815451832893
implied_high 0.1920815451832893
implied_low 0.1635074310237917
implied_close 0.1635074310237917
historical_open 0.1508078247306817
historical_high 0.1508078247306817
historical_low 0.1508078247306817
historical_close 0.1508078247306817
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