Delete row ('404', '20150') from daily_volatility

ticker_id 404
day 20150
implied_open 0.1650948818104304
implied_high 0.1857317420367343
implied_low 0.1650948818104304
implied_close 0.1857317420367343
historical_open 0.1841442912500955
historical_high 0.1841442912500955
historical_low 0.1841442912500955
historical_close 0.1841442912500955
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