Delete row ('331', '20693') from daily_volatility

ticker_id 331
day 20693
implied_open 0.847698720065095
implied_high 0.847698720065095
implied_low 0.795312844106016
implied_close 0.7969002948926548
historical_open 1.244561416724783
historical_high 1.244561416724783
historical_low 1.244561416724783
historical_close 1.244561416724783
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