Delete row ('635', '20542') from daily_volatility

ticker_id 635
day 20542
implied_open 0.8508736216383724
implied_high 0.8937347928776188
implied_low 0.7207026571339945
implied_close 0.7651512791598797
historical_open 0.9238963578237551
historical_high 0.9238963578237551
historical_low 0.9238963578237551
historical_close 0.9238963578237551
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