Removed ios plist generation and ios_plist writer

components/policy/resources/policy_templates.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that are used in policy
 templates and will be translated for each locale. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="app/policy/common/html/am/chrome_policy_list.html" type="doc" lang="am" />
     <output filename="app/policy/common/html/ar/chrome_policy_list.html" type="doc" lang="ar" />
@@ skipping 221 matching lines @@
       <output filename="app/policy/mac/strings/sv.lproj/Localizable.strings" type="plist_strings" lang="sv" />
       <output filename="app/policy/mac/strings/sw.lproj/Localizable.strings" type="plist_strings" lang="sw" />
       <output filename="app/policy/mac/strings/ta.lproj/Localizable.strings" type="plist_strings" lang="ta" />
       <output filename="app/policy/mac/strings/te.lproj/Localizable.strings" type="plist_strings" lang="te" />
       <output filename="app/policy/mac/strings/th.lproj/Localizable.strings" type="plist_strings" lang="th" />
       <output filename="app/policy/mac/strings/tr.lproj/Localizable.strings" type="plist_strings" lang="tr" />
       <output filename="app/policy/mac/strings/uk.lproj/Localizable.strings" type="plist_strings" lang="uk" />
       <output filename="app/policy/mac/strings/vi.lproj/Localizable.strings" type="plist_strings" lang="vi" />
       <output filename="app/policy/mac/strings/zh_CN.lproj/Localizable.strings" type="plist_strings" lang="zh-CN" />
       <output filename="app/policy/mac/strings/zh_TW.lproj/Localizable.strings" type="plist_strings" lang="zh-TW" />
-
-      <!-- Generate the sample iOS plist when building the templates for the Mac. -->
-      <output filename="app/policy/ios/chrome_policy.plist" type="ios_plist" lang="en" />
     </if>
   </outputs>
   <translations>
     <file path="policy_templates_am.xtb" lang="am" />
     <file path="policy_templates_ar.xtb" lang="ar" />
     <file path="policy_templates_bg.xtb" lang="bg" />
     <file path="policy_templates_bn.xtb" lang="bn" />
     <file path="policy_templates_ca.xtb" lang="ca" />
     <file path="policy_templates_cs.xtb" lang="cs" />
     <file path="policy_templates_da.xtb" lang="da" />
@@ skipping 45 matching lines @@
     <file path="policy_templates_zh-TW.xtb" lang="zh-TW" />
   </translations>
   <release seq="1" allow_pseudo="false">
     <structures fallback_to_english="true">
       <!-- List of policies and placeholder texts. This item should precede any
       message definitions. -->
       <structure name="IDD_POLICY_SOURCE_FILE" file="policy_templates.json" type="policy_template_metafile" />
     </structures>
   </release>
 </grit>