Delete row ('1644', '20734') from daily_volatility

ticker_id 1644
day 20734
implied_open 0.4540109249786838
implied_high 0.8683355802913987
implied_low 0.3111403541811958
implied_close 0.3317772144074996
historical_open 0.2333552656358969
historical_high 0.2333552656358969
historical_low 0.2333552656358969
historical_close 0.2333552656358969
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