Remove remnants of DHE support.

components/policy/resources/policy_templates.json

 {
 # policy_templates.json - Metafile for policy templates
 #
 # The content of this file is evaluated as a Python expression.
 #
 # This file is used as input to generate the following policy templates:
 # ADM, ADMX+ADML, MCX/plist and html documentation.
 #
 # Policy templates are user interface definitions or documents about the
 # policies that can be used to configure Chrome. Each policy is a name-value
@@ skipping 8182 matching lines @@
       'supported_on': [
         'chrome.*:39-43',
         'chrome_os:39-43',
         'android:39-43',
         'ios:39-43',
       ],
       'features': {
         'dynamic_refresh': True,
         'per_profile': False,
       },
+      'deprecated': True,
       'example_value': 'ssl3',
       'id': 279,
       'caption': '''Minimum SSL version enabled''',
       'tags': [],
       'desc': '''Warning: SSLv3 support will be entirely removed from <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> after version 43 (around July 2015) and this policy will be removed at the same time.
 
       If this policy is not configured then <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> uses a default minimum version which is SSLv3 in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> 39 and TLS 1.0 in later versions.
 
       Otherwise it may be set to one of the following values: "sslv3", "tls1", "tls1.1" or "tls1.2". When set, <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will not use SSL/TLS versions less than the specified version. An unrecognized value will be ignored.
 
@@ skipping 81 matching lines @@
       'supported_on': [
         'chrome.*:48-52',
         'chrome_os:48-52',
         'android:48-52',
         'ios:48-52',
       ],
       'features': {
         'dynamic_refresh': True,
         'per_profile': False,
       },
+      'deprecated': True,
       'example_value': False,
       'id': 310,
       'caption': '''Whether RC4 cipher suites in TLS are enabled''',
       'tags': ['system-security'],
       'desc': '''Warning: RC4 will be completely removed from <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> after version 52 (around September 2016) and this policy will stop working then.
 
       If the policy is not set, or is set to false, then RC4 cipher suites in TLS will not be enabled. Otherwise it may be set to true to retain compatibility with an outdated server. This is a stopgap measure and the server should be reconfigured.''',
     },
     {
       'name': 'DHEEnabled',
       'type': 'main',
       'schema': {
         'type': 'boolean',
       },
       'supported_on': [
         'chrome.*:53-57',
         'chrome_os:53-57',
         'android:53-57',
         'ios:53-57',
       ],
       'features': {
         'dynamic_refresh': True,
         'per_profile': False,
       },
+      'deprecated': True,
       'example_value': False,
       'id': 334,
       'caption': '''Whether DHE cipher suites in TLS are enabled''',
       'tags': ['system-security'],
       'desc': '''Warning: DHE will be completely removed from <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> after version 57 (around March 2017) and this policy will stop working then.
 
       If the policy is not set, or is set to false, then DHE cipher suites in TLS will not be enabled. Otherwise it may be set to true to enable DHE cipher suites and retain compatibility with an outdated server. This is a stopgap measure and the server should be reconfigured.
 
       Servers are encouraged to migrated to ECDHE cipher suites. If these are unavailable, ensure a cipher suite using RSA key exchange is enabled.''',
     },
@@ skipping 1237 matching lines @@
       'desc': '''Text appended in parentheses next to the policies top-level container to indicate that those policies are of the Recommended level''',
       'text': 'Default Settings (users can override)',
     },
     'doc_complex_policies_on_windows': {
       'desc': '''Text pointing the user to a help article for complex policies on Windows''',
       'text': '''encoded as a JSON string, for details see <ph name="COMPLEX_POLICIES_URL">https://www.chromium.org/administrators/complex-policies-on-windows<ex>https://www.chromium.org/administrators/complex-policies-on-windows</ex></ph>''',
     },
   },
   'placeholders': [],
 }