Delete row ('738', '20185') from daily_volatility

ticker_id 738
day 20185
implied_open 0.814362253545681
implied_high 0.9540579227698914
implied_low 0.7826132378129059
implied_close 0.8032500980392098
historical_open 0.7032406984809682
historical_high 0.7032406984809682
historical_low 0.7032406984809682
historical_close 0.7032406984809682
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