Got rid of Math::Geometry::Planar

lib/Slic3r/Surface.pm

@@ -1,8 +1,6 @@
 package Slic3r::Surface;
 use Moo;
 
-use Math::Geometry::Planar;
-
 has 'contour' => (
     is          => 'ro',
     #isa         => 'Slic3r::Polyline::Closed',
@@ -42,14 +40,6 @@ sub encloses_point {
     return 1;
 }
 
-sub mgp_polygon {
-    my $self = shift;
-    
-    my $p = Math::Geometry::Planar->new;
-    $p->polygons([ $self->contour->p, map($_->p, @{ $self->holes }) ]);
-    return $p;
-}
-
 sub clipper_polygon {
     my $self = shift;