Delete row ('2758', '20171') from daily_volatility

ticker_id 2758
day 20171
implied_open 0.1936689959699281
implied_high 0.2047811514763993
implied_low 0.1904940943966505
implied_close 0.1936689959699281
historical_open 0.2333552656358969
historical_high 0.2333552656358969
historical_low 0.2333552656358969
historical_close 0.2333552656358969
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