Removed the Point::wkt() and Point::dump_perl() methods.

Added to_string() for the basis Eigen vector types.

xs/src/libslic3r/Polygon.cpp

@@ -230,19 +230,6 @@ Polygon::centroid() const
     return Point(x_temp/(6*area_temp), y_temp/(6*area_temp));
 }
 
-std::string
-Polygon::wkt() const
-{
-    std::ostringstream wkt;
-    wkt << "POLYGON((";
-    for (Points::const_iterator p = this->points.begin(); p != this->points.end(); ++p) {
-        wkt << p->x() << " " << p->y();
-        if (p != this->points.end()-1) wkt << ",";
-    }
-    wkt << "))";
-    return wkt.str();
-}
-
 // find all concave vertices (i.e. having an internal angle greater than the supplied angle)
 // (external = right side, thus we consider ccw orientation)
 Points