Delete row ('304', '20735') from daily_volatility

ticker_id 304
day 20735
implied_open 0.3111403541811958
implied_high 0.3111403541811958
implied_low 0.271454084515227
implied_close 0.2984407478880858
historical_open 0.2206556593427869
historical_high 0.2206556593427869
historical_low 0.2206556593427869
historical_close 0.2206556593427869
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