Updated sidebar layout

app.py

@@ -162,7 +162,6 @@ st.sidebar.write("""
                 ultraviolet index: 3
                 """)
 st.sidebar.audio('sound/sample_conditions_1.wav')
-st.sidebar.markdown('---')
 
 # Sample 2
 st.sidebar.write("""
@@ -176,7 +175,6 @@ st.sidebar.write("""
                 ultraviolet index: 2
                 """)
 st.sidebar.audio('sound/sample_conditions_2.wav')
-st.sidebar.markdown('---')
 
 # Option to hear more audios
 show_more_plant_audio = st.sidebar.checkbox('Show more audios of terrarium plants')