Delete row ('2550', '20726') from daily_volatility

ticker_id 2550
day 20726
implied_open 0.3476517222738872
implied_high 0.355588976207081
implied_low 0.3365395667674159
implied_close 0.3413019191273322
historical_open 0.3032031002480021
historical_high 0.3032031002480021
historical_low 0.3032031002480021
historical_close 0.3032031002480021
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