Delete row ('2757', '20493') from daily_volatility

ticker_id 2757
day 20493
implied_open 0.1635074310237917
implied_high 0.1730321357436242
implied_low 0.1539827263039592
implied_close 0.1571576278772367
historical_open 0.1492203739440429
historical_high 0.1492203739440429
historical_low 0.1492203739440429
historical_close 0.1492203739440429
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