Delete row ('1992', '20130') from daily_volatility

ticker_id 1992
day 20130
implied_open 0.6413301178020567
implied_high 0.6635544288149993
implied_low 0.6127560036425592
implied_close 0.620693257575753
historical_open 0.8715104818646762
historical_high 0.8715104818646762
historical_low 0.8715104818646762
historical_close 0.8715104818646762
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