removed unneeded private fields

src/CanvasGradient.cc

@@ -101,8 +101,7 @@ Gradient::AddColorStop(const Arguments &args) {
  * Initialize linear gradient.
  */
 
-Gradient::Gradient(double x0, double y0, double x1, double y1):
-  _x0(x0), _y0(y0), _x1(x1), _y1(y1) {
+Gradient::Gradient(double x0, double y0, double x1, double y1) {
   _pattern = cairo_pattern_create_linear(x0, y0, x1, y1);
 }
 
@@ -110,8 +109,7 @@ Gradient::Gradient(double x0, double y0, double x1, double y1):
  * Initialize radial gradient.
  */
 
-Gradient::Gradient(double x0, double y0, double r0, double x1, double y1, double r1):
-  _x0(x0), _y0(y0), _x1(x1), _y1(y1), _r0(r0), _r1(r1) {
+Gradient::Gradient(double x0, double y0, double r0, double x1, double y1, double r1) {
   _pattern = cairo_pattern_create_radial(x0, y0, r0, x1, y1, r1);
 }
 

src/CanvasGradient.h

@@ -22,7 +22,6 @@ class Gradient: public node::ObjectWrap {
 
   private:
     ~Gradient();
-    double _x0, _y0, _x1, _y1, _r0, _r1;
     cairo_pattern_t *_pattern;
 };