Delete row ('468', '20734') from daily_volatility

ticker_id 468
day 20734
implied_open 0.3508266238471647
implied_high 0.3508266238471647
implied_low 0.2428799703557294
implied_close 0.252404675075562
historical_open 0.2047811514763993
historical_high 0.2047811514763993
historical_low 0.2047811514763993
historical_close 0.2047811514763993
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