Delete row ('193', '20140') from daily_volatility

ticker_id 193
day 20140
implied_open 0.7397520665736596
implied_high 0.8461112692784561
implied_low 0.6587920764550831
implied_close 0.7588014760133247
historical_open 1.135027312446709
historical_high 1.135027312446709
historical_low 1.135027312446709
historical_close 1.135027312446709
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