Optimize dataframe display condition in MLB ROO simulation

app.py

@@ -108,5 +108,5 @@ with tab2:
                 elif site_var_sb == "Fanduel":
                     disp_file = FD_MLB_ROO_Build(projections, floor_var_sb, ceiling_var_sb, std_var_sb, distribution_type_sb)
 
-    if disp_file is not None:
+    if disp_file:
         st.dataframe(disp_file.style.background_gradient(axis=0).background_gradient(cmap='RdYlGn').format(precision=2), height=1000, use_container_width = True)