Delete row ('193', '20150') from daily_volatility

ticker_id 193
day 20150
implied_open 0.9270712593970326
implied_high 0.9413583164767814
implied_low 0.7572140252266859
implied_close 0.8762728342245925
historical_open 1.30012219425714
historical_high 1.30012219425714
historical_low 1.30012219425714
historical_close 1.30012219425714
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