Delete row ('2531', '20734') from daily_volatility

ticker_id 2531
day 20734
implied_open 0.4254368108191862
implied_high 0.4667105312717938
implied_low 0.4254368108191862
implied_close 0.465123080485155
historical_open 0.3476517222738872
historical_high 0.3476517222738872
historical_low 0.3476517222738872
historical_close 0.3476517222738872
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