Delete row ('193', '20180') from daily_volatility

ticker_id 193
day 20180
implied_open 0.8334116629853461
implied_high 0.8762728342245925
implied_low 0.7778508854529897
implied_close 0.8080124503991261
historical_open 1.247736318298061
historical_high 1.247736318298061
historical_low 1.247736318298061
historical_close 1.247736318298061
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