Delete row ('40', '20179') from daily_volatility

ticker_id 40
day 20179
implied_open 0.2460548719290069
implied_high 0.2508172242889232
implied_low 0.2397050687824519
implied_close 0.2444674211423682
historical_open 0.3762258364333848
historical_high 0.3762258364333848
historical_low 0.3762258364333848
historical_close 0.3762258364333848
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