Delete row ('820', '20733') from daily_volatility

ticker_id 820
day 20733
implied_open 0.9334210625435876
implied_high 1.081053985700992
implied_low 0.8810351865845087
implied_close 0.8842100881577862
historical_open 0.7111779524141619
historical_high 0.7111779524141619
historical_low 0.7111779524141619
historical_close 0.7111779524141619
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