Reverted some changes to light classes which was not meant to be committed as part of #314.

jme3-core/src/main/java/com/jme3/light/Light.java

@@ -122,22 +122,6 @@ public abstract class Light implements Savable, Cloneable {
         setColor(color);
     }
 
-    /**
-     * Default constructor for Light.
-     */
-    public Light() {
-
-    }
-
-    /**
-     * Constructor which allows setting of the color.
-     *
-     * @param color the color to apply to this light.
-     */
-    public Light(final ColorRGBA color) {
-        this.color = color;
-    }
-
     /**
      * Returns the color of the light.
      *