Delete row ('2305', '20502') from daily_volatility

ticker_id 2305
day 20502
implied_open 0.7080030508408844
implied_high 0.7095905016275231
implied_low 0.6349803146555018
implied_close 0.6651418796016381
historical_open 0.7095905016275231
historical_high 0.7095905016275231
historical_low 0.7095905016275231
historical_close 0.7095905016275231
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