Delete row ('2248', '20731') from daily_volatility

ticker_id 2248
day 20731
implied_open 0.4968720962179302
implied_high 0.4968720962179302
implied_low 0.3079654526079184
implied_close 0.3222525096876671
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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