💯 Remove invalid paths from optimize-png-files.sh

This is necessary to make the -c option work again.

Change-Id: Ia0210e4af2dd64add08e389da8cf6fb5dc203495
Reviewed-on: https://chromium-review.googlesource.com/716259
Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: Bernhard Bauer <bauerb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#508674}

tools/resources/optimize-png-files.sh

@@ -22,17 +22,14 @@ chrome/android/java/res
 chrome/app/theme
 chrome/browser/resources
 chrome/renderer/resources
-component/resources
 content/public/android/java/res
 content/app/resources
-content/renderer/resources
 content/shell/resources
 remoting/resources
 ui/android/java/res
 ui/resources
 ui/chromeos/resources
 ui/webui/resources/images
-win8/resources
 "
 
 # Files larger than this file size (in bytes) will