RGB shim no longer required

Cakefile

@@ -9,10 +9,9 @@ task 'compile', 'Compile with browserify for the web', ->
   .transform('coffeeify')
   .require('./shims/png.coffee', expose: './image_exports/png.coffee')
   .require('./shims/init.coffee', expose: './psd/init.coffee')
-  .require('./shims/rgb.coffee', expose: './image_modes/rgb.coffee')
   .require('./lib/psd.coffee', expose: 'psd')
   .bundle (err, src) ->
     return console.log(err) if err?
     fs.writeFile './dist/psd.js', src, ->
       fs.stat './dist/psd.js', (err, stats) ->
-        console.log "Compiled to ./dist/psd.js - #{Math.round(stats.size / 1024)}KB"
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+        console.log "Compiled to ./dist/psd.js - #{Math.round(stats.size / 1024)}KB"

shims/rgb.coffee

-module.exports =
-  combineRgbChannel: ->
-    rgbChannels = @channelsInfo
-      .map (ch) -> ch.id
-      .filter (ch) -> ch >= -1
-
-    for i in [0...@numPixels]
-      r = g = b = 0
-      a = 255
-
-      for chan, index in rgbChannels
-        val = @channelData[i + (@channelLength * index)]
-
-        switch chan
-          when -1 then a = val
-          when 0 then  r = val
-          when 1 then  g = val
-          when 2 then  b = val
-
-      @pixelData.push r, g, b, a
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