Delete row ('6', '20556') from daily_volatility

ticker_id 6
day 20556
implied_open 1.620787253158168
implied_high 1.676348030690525
implied_low 1.60650019607842
implied_close 1.611262548438336
historical_open 1.619199802371529
historical_high 1.619199802371529
historical_low 1.619199802371529
historical_close 1.619199802371529
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