Delete row ('2519', '20200') from daily_volatility

ticker_id 2519
day 20200
implied_open 0.8080124503991261
implied_high 0.8080124503991261
implied_low 0.7524516728667696
implied_close 0.795312844106016
historical_open 0.9492955704099751
historical_high 0.9492955704099751
historical_low 0.9492955704099751
historical_close 0.9492955704099751
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