Delete row ('1953', '20439') from daily_volatility

ticker_id 1953
day 20439
implied_open 0.1825568404634567
implied_high 0.1857317420367343
implied_low 0.174619586530263
implied_close 0.1857317420367343
historical_open 0.1857317420367343
historical_high 0.1857317420367343
historical_low 0.1857317420367343
historical_close 0.1857317420367343
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