Delete row ('635', '20178') from daily_volatility

ticker_id 635
day 20178
implied_open 0.86674812950476
implied_high 0.9731073322095565
implied_low 0.8207120566922361
implied_close 0.9127842023172839
historical_open 1.071529280981159
historical_high 1.071529280981159
historical_low 1.071529280981159
historical_close 1.071529280981159
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