Delete row ('51', '20734') from daily_volatility

ticker_id 51
day 20734
implied_open 1.303297095830418
implied_high 3.620975244322999
implied_low 0.9778696845694728
implied_close 1.957326819925584
historical_open 0.8254744090521523
historical_high 0.8254744090521523
historical_low 0.8254744090521523
historical_close 0.8254744090521523
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