Delete row ('990', '20734') from daily_volatility

ticker_id 990
day 20734
implied_open 0.3159027065411121
implied_high 0.3159027065411121
implied_low 0.2539921258622007
implied_close 0.2587544782221169
historical_open 0.2047811514763993
historical_high 0.2047811514763993
historical_low 0.2047811514763993
historical_close 0.2047811514763993
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