[iOS] Updating icons for Google sync services item

Few last minute upates on the icon.

Signed out:
https://drive.google.com/open?id=1aZ0zKE8j04pqDtj7fHKOR_IRT421GXZg
Sync error:
https://drive.google.com/open?id=10ugnfgeh5wBT2mKweRSVA0UQ-z-_mdx_

Bug: 889470
Change-Id: Ie22e8af005729841a78517e733b55e4acedbe14a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1505451Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638523}

ios/chrome/browser/ui/settings/resources/BUILD.gn

@@ -151,7 +151,6 @@ imageset("settings_voice_search") {
 imageset("sync_and_google_services") {
   sources = [
     "sync_and_google_services.imageset/Contents.json",
-    "sync_and_google_services.imageset/sync_and_google_services.png",
     "sync_and_google_services.imageset/sync_and_google_services@2x.png",
     "sync_and_google_services.imageset/sync_and_google_services@3x.png",
   ]

ios/chrome/browser/ui/settings/resources/sync_and_google_services.imageset/Contents.json

 {
     "images": [
-        {
-            "idiom": "universal",
-            "scale": "1x",
-            "filename": "sync_and_google_services.png"
-        },
         {
             "idiom": "universal",
             "scale": "2x",