Delete row ('331', '20487') from daily_volatility

ticker_id 331
day 20487
implied_open 1.187413188405788
implied_high 1.252498670657977
implied_low 1.157251623459652
implied_close 1.231861810431673
historical_open 0.9540579227698914
historical_high 0.9540579227698914
historical_low 0.9540579227698914
historical_close 0.9540579227698914
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