Delete row ('12', '20173') from daily_volatility

ticker_id 12
day 20173
implied_open 0.2508172242889232
implied_high 0.2539921258622007
implied_low 0.2333552656358969
implied_close 0.2412925195690907
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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