Delete row ('331', '20696') from daily_volatility

ticker_id 331
day 20696
implied_open 0.8000751964659323
implied_high 0.814362253545681
implied_low 0.7746759838797123
implied_close 0.776263434666351
historical_open 1.233449261218312
historical_high 1.233449261218312
historical_low 1.233449261218312
historical_close 1.233449261218312
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