Delete row ('9', '20704') from daily_volatility

ticker_id 9
day 20704
implied_open 0.2444674211423682
implied_high 0.2666917321553107
implied_low 0.2333552656358969
implied_close 0.2555795766488395
historical_open 0.3587638777803585
historical_high 0.3587638777803585
historical_low 0.3587638777803585
historical_close 0.3587638777803585
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