Delete row ('9', '20187') from daily_volatility

ticker_id 9
day 20187
implied_open 0.633392863868863
implied_high 0.6413301178020567
implied_low 0.4428987694722125
implied_close 0.4428987694722125
historical_open 0.5778320863365066
historical_high 0.5778320863365066
historical_low 0.5778320863365066
historical_close 0.5778320863365066
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