Delete row ('2506', '20735') from daily_volatility

ticker_id 2506
day 20735
implied_open 1.506490796520178
implied_high 1.908115845539783
implied_low 0.9080218499573676
implied_close 1.441405314267989
historical_open 0.7746759838797123
historical_high 0.7746759838797123
historical_low 0.7746759838797123
historical_close 0.7746759838797123
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