Delete row ('1992', '20175') from daily_volatility

ticker_id 1992
day 20175
implied_open 0.6365677654421404
implied_high 0.730227361853827
implied_low 0.6175183560024754
implied_close 0.6905410921878581
historical_open 0.8969096944508963
historical_high 0.8969096944508963
historical_low 0.8969096944508963
historical_close 0.8969096944508963
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