deleting duplicate menu item

Author: rcurty

_quarto.yml

@@ -63,8 +63,6 @@ website:
             text: Introduction to Sentiment Analysis
           - href: chapters/3.SentimentAnalysis/polarity.qmd
             text: Polarity Classification
-          - href: chapters/3.SentimentAnalysis/polarity.qmd
-            text: Polarity Classification
           - href: chapters/3.SentimentAnalysis/emotion.qmd
             text: Emotion Detection
       - about.qmd