Delete row ('331', '20180') from daily_volatility

ticker_id 331
day 20180
implied_open 0.7254650094939107
implied_high 0.7334022634271045
implied_low 0.6968908953344132
implied_close 0.7080030508408844
historical_open 0.8762728342245925
historical_high 0.8762728342245925
historical_low 0.8762728342245925
historical_close 0.8762728342245925
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