Update multiple-axes.md

Author: LiamConnors

Diff for: doc/python/multiple-axes.md

@@ -396,7 +396,6 @@ fig.add_trace(
 
 fig.update_layout(
     legend=dict(orientation="h"),
-    xaxis=dict(showgrid=True, ticklen=10, tickwidth=3),
     yaxis=dict(
         title=dict(text="Total number of diners"),
         side="left",
@@ -411,6 +410,8 @@ fig.update_layout(
     ),
 )
 
+fig.show()
+
 ```
 
 #### Reference