Delete row ('2631', '20503') from daily_volatility

ticker_id 2631
day 20503
implied_open 1.084228887274269
implied_high 1.19852534391226
implied_low 0.9905692908625827
implied_close 1.130264960086793
historical_open 1.655711170464221
historical_high 1.655711170464221
historical_low 1.655711170464221
historical_close 1.655711170464221
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