Tweak instructions so it's more clear how to update CEF builds and remove a spurious comment

build-cmd.sh

@@ -26,7 +26,7 @@ source_environment_tempfile="$stage/source_environment.sh"
 "$AUTOBUILD" source_environment > "$source_environment_tempfile"
 . "$source_environment_tempfile"
 
-# URLs of the CEF bundle to download.
+# URLs of the CEF bundle to download (this is what to change to updatge CEF build)
 CEF_BUNDLE_URL_WINDOWS32="http://opensource.spotify.com/cefbuilds/cef_binary_3.3239.1716.g735b746_windows32.tar.bz2"
 CEF_BUNDLE_URL_WINDOWS64="http://opensource.spotify.com/cefbuilds/cef_binary_3.3239.1716.g735b746_windows64.tar.bz2"
 CEF_BUNDLE_URL_DARWIN64="http://opensource.spotify.com/cefbuilds/cef_binary_3.3239.1716.g735b746_macosx64.tar.bz2"
@@ -112,8 +112,6 @@ case "$AUTOBUILD_PLATFORM" in
     ;;
 
     darwin64)
-#CEF_BUNDLE_SRC_DIR_DARWIN64="${CEF_BUNDLE_SRC_DIR_DARWIN64}"
-
         # download bundle
         CEF_BUNDLE_URL="CEF_BUNDLE_URL_DARWIN64"
         curl "${!CEF_BUNDLE_URL}" -o "${CEF_BUNDLE_DOWNLOAD_FILE_DARWIN64}"