Delete row ('40', '20402') from daily_volatility

ticker_id 40
day 20402
implied_open 0.3222525096876671
implied_high 0.3333646651941384
implied_low 0.3111403541811958
implied_close 0.3317772144074996
historical_open 0.2555795766488395
historical_high 0.2555795766488395
historical_low 0.2555795766488395
historical_close 0.2555795766488395
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