If you delete the item from the Display Tree, it will not show up in the interactive HTML.
names default to here(1);
dt=current data table();
biv = dt << Bivariate(
Y( :height ),
X( :weight ),
Fit Spline( 1000, {Line Color( {213, 72, 87} )} )
);
report(biv)[PictureBox(2)]<<delete;
I ran this in JMP 12
Jim