Delete row ('635', '20504') from daily_volatility

ticker_id 635
day 20504
implied_open 1.020730855808719
implied_high 1.08264143648763
implied_low 0.9350085133302264
implied_close 0.9953316432224991
historical_open 0.9826320369293889
historical_high 0.9826320369293889
historical_low 0.9826320369293889
historical_close 0.9826320369293889
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