Delete row ('1544', '20171') from daily_volatility

ticker_id 1544
day 20171
implied_open 0.2016062499031218
implied_high 0.2016062499031218
implied_low 0.1889066436100118
implied_close 0.1904940943966505
historical_open 0.2047811514763993
historical_high 0.2047811514763993
historical_low 0.2047811514763993
historical_close 0.2047811514763993
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