remove redundant function (#1532)

Co-authored-by: Harsh Khandeparkar <34770591+HarshKhandeparkar@users.noreply.github.com>
Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>

src/modules/AddQR/Module.js

@@ -17,10 +17,6 @@ module.exports = function AddQR(options, UI) {
 
     var step = this;
 
-    function changePixel(r, g, b, a) {
-      return [r, g, b, a];
-    }
-
     function extraManipulation(pixels, setRenderState, generateOutput) {
       let iw = pixels.shape[0], // Width of Original Image
         ih = pixels.shape[1]; // Height of Original Image
@@ -50,7 +46,6 @@ module.exports = function AddQR(options, UI) {
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
       ui: options.step.ui,
-      changePixel: changePixel,
       extraManipulation: extraManipulation,
       format: input.format,
       image: options.image,