Delete row ('40', '20157') from daily_volatility

ticker_id 40
day 20157
implied_open 0.3587638777803585
implied_high 0.3984501474463274
implied_low 0.3587638777803585
implied_close 0.3984501474463274
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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