Delete row ('2331', '20726') from daily_volatility

ticker_id 2331
day 20726
implied_open 0.5651324800433966
implied_high 0.6730791335348318
implied_low 0.3762258364333848
implied_close 0.5190964072308727
historical_open 0.4682979820584325
historical_high 0.4682979820584325
historical_low 0.4682979820584325
historical_close 0.4682979820584325
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