barchartparm about "orient=horizontal"

[Bill3]

My question: How to make the vertical line pointed by the second red arrow from left to right disappear. (The line above the X axis of 0)

Test Code: 

proc template;
define statgraph Fig_4_5_3;
begingraph;
entrytitle 'Spline Fit Plot Mileage by Horsepower';
layout overlay /cycleattrs=true walldisplay = none yaxisopts=(griddisplay=off) xaxisopts=(griddisplay=off linearopts=(viewmin=-0.5 viewmax=3 tickvaluesequence=(start=0 end=3 increment=1)));
barchartparm category=mpg_city response=horsepower /orient=horizontal barwidth=0.3

;
endlayout;
endgraph;
end;
run; 
proc sgrender data=sashelp.cars(where=(type='Sedan'))
template=Fig_4_5_3;
run;

[Ksharp · Accepted solution]

Try option DISPLAYBASELINE= .

barchartparm category=mpg_city response=horsepower /orient=horizontal barwidth=0.3 DISPLAYBASELINE=off

[Bill3]

good, it worked.