Delete row ('217', '20731') from daily_volatility

ticker_id 217
day 20731
implied_open 0.2730415353018658
implied_high 0.2920909447415308
implied_low 0.2492297735022844
implied_close 0.2571670274354782
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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