Removed wrong optimization causing possible extra retractions while moving in infill space

lib/Slic3r/Layer/Region.pm

@@ -28,6 +28,7 @@ has 'overhang_width'    => (is => 'lazy');
 has 'lines' => (is => 'rw', default => sub { [] });
 
 # collection of surfaces generated by slicing the original geometry
+# divided by type top/bottom/internal
 has 'slices' => (is => 'rw', default => sub { [] });
 
 # collection of polygons or polylines representing thin walls contained 
@@ -266,8 +267,7 @@ sub make_perimeters {
                 $role = EXTR_ROLE_CONTOUR_INTERNAL_PERIMETER;
             }
             
-            ### Disable overhang detection for now
-            if (0 && $self->id > 0) {
+            if ($self->id > 0) {
                 # A perimeter is considered overhang if its centerline exceeds the lower layer slices
                 my $is_overhang = $is_contour
                     ? @{diff([$polygon], \@lower_slices)}