Delete row ('226', '20731') from daily_volatility

ticker_id 226
day 20731
implied_open 0.2492297735022844
implied_high 0.265104281368672
implied_low 0.2492297735022844
implied_close 0.2587544782221169
historical_open 0.2000187991164831
historical_high 0.2000187991164831
historical_low 0.2000187991164831
historical_close 0.2000187991164831
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