Delete row ('2503', '20734') from daily_volatility

ticker_id 2503
day 20734
implied_open 0.4428987694722125
implied_high 0.4428987694722125
implied_low 0.3889254427264949
implied_close 0.4254368108191862
historical_open 0.2762164368751432
historical_high 0.2762164368751432
historical_low 0.2762164368751432
historical_close 0.2762164368751432
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