Remove non-working line

Author: driscollis

06_charts/bar_chart_categories.py

@@ -26,7 +26,6 @@ def main(filename):
     bar_chart.title = "Book Sales"
     bar_chart.x_axis.title = "Book Types"
     bar_chart.y_axis.title = "Prices"
-    bar_chart.set_x_axis({'num_font':  {'rotation': 45}})
 
 
     data = Reference(worksheet=sheet,