Remove {big5,gb2312}han collation data

icu52/scripts/trim_data.sh

 #!/bin/bash
 # Copyright (c) 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 # Remove display names for languages that are not listed in the accept-language
 # list of Chromium.
 function filter_display_language_names {
   UI_LANG_PATTERN="(${UI_LANGUAGES})[^a-z]"
@@ skipping 88 matching lines @@
   do
     [ $i != 'root.txt' ] && \
     sed -i '/^    zoneStrings/, /^        "meta:/ {
       /^    zoneStrings/ p
       /^        "meta:/ p
       d
     }' $i
   done
 }
 
+# big5han and gb2312han collation do not make any sense and nobody uses them.
+function remove_legacy_chinese_codepoint_collation {
+  echo "Removing Big5 / GB2312 collation data from Chinese locale"
+  target="${dataroot}/coll/zh.txt"
+  echo "Overwriting ${target}"
+  sed -r -i '/^        (big5|gb2312)han\{$/,/^        \}$/ d' ${target}
+}
+
 dataroot="$(dirname $0)/../source/data"
 localedatapath="${dataroot}/locales"
 langdatapath="${dataroot}/lang"
 
 for lang in $(grep -v '^#' chrome_ui_languages.list)
 do
   # Set $OP to '|' only if $UI_LANGUAGES is not empty.
   OP=${UI_LANGUAGES:+|}
   UI_LANGUAGES="${UI_LANGUAGES}${OP}${lang}"
 done
 
 
 filter_display_language_names
 abridge_locale_data_for_non_ui_languages
 filter_currency_data
 filter_region_data
+remove_legacy_chinese_codepoint_collation
 
 # Chromium OS needs exemplar cities for timezones, but not Chromium.
 # It'll save 400kB (uncompressed), but the size difference in
 # 7z compressed installer is <= 100kB.
 # TODO(jshin): Make separate data files for CrOS and Chromium.
 #fremove_exemplar_cities
+
+