Delete row ('9', '20157') from daily_volatility

ticker_id 9
day 20157
implied_open 0.271454084515227
implied_high 0.3492391730605259
implied_low 0.271454084515227
implied_close 0.3381270175540547
historical_open 0.3143152557544734
historical_high 0.3143152557544734
historical_low 0.3143152557544734
historical_close 0.3143152557544734
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