remove error when use of fusion

rawls/rawls.cpp

@@ -100,9 +100,6 @@ bool rawls::saveAsPNG(unsigned width, unsigned height, unsigned nbChanels, float
                 float value = buffer[nbChanels * width * y + nbChanels * x + j];
                 image[nbChanelsAlpha * width * y + nbChanelsAlpha * x + j] = int(GammaConvert(value)); 
             } 
-
-            image[nbChanelsAlpha * width * y + nbChanelsAlpha * x + 3] = 255;
-
         }
     }