minimal.c: remove first stroke / unused params

The initial stroke is not necessary/correct after the reversal of
count_dabs_to's semantics for legacy strokes (and new-style strokes).

Author: jplloyd

examples/minimal.c

@@ -4,7 +4,6 @@
 void
 stroke_to(MyPaintBrush *brush, MyPaintSurface *surf, float x, float y)
 {
-    float viewzoom = 1.0, viewrotation = 0.0, barrel_rotation = 0.0;
     float pressure = 1.0, ytilt = 0.0, xtilt = 0.0, dtime = 1.0/10;
     mypaint_brush_stroke_to
       (brush, surf, x, y, pressure, xtilt, ytilt, dtime);
@@ -30,7 +29,6 @@ main(int argc, char argv[]) {
 
     /* Draw a rectangle on the surface using the brush */
     mypaint_surface_begin_atomic((MyPaintSurface*)surface);
-    stroke_to(brush, (MyPaintSurface*)surface, 0, 0);
     stroke_to(brush, (MyPaintSurface*)surface, wq, hq);
     stroke_to(brush, (MyPaintSurface*)surface, 4 * wq, hq);
     stroke_to(brush, (MyPaintSurface*)surface, 4 * wq, 4 * hq);