Remove old default search preferences.

components/search_engines/default_search_policy_handler.h

 // Copyright 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_
 #define COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/policy/core/browser/configuration_policy_handler.h"
 
 namespace policy {
 
-// ConfigurationPolicyHandler for the DefaultSearchEncodings policy.
-class DefaultSearchEncodingsPolicyHandler
-    : public TypeCheckingPolicyHandler {
- public:
-  DefaultSearchEncodingsPolicyHandler();
-  ~DefaultSearchEncodingsPolicyHandler() override;
-
-  // ConfigurationPolicyHandler methods:
-  void ApplyPolicySettings(const PolicyMap& policies,
-                           PrefValueMap* prefs) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DefaultSearchEncodingsPolicyHandler);
-};
-
 // ConfigurationPolicyHandler for the default search policies.
 class DefaultSearchPolicyHandler : public ConfigurationPolicyHandler {
  public:
   DefaultSearchPolicyHandler();
   ~DefaultSearchPolicyHandler() override;
 
   // ConfigurationPolicyHandler methods:
   bool CheckPolicySettings(const PolicyMap& policies,
                            PolicyErrorMap* errors) override;
   void ApplyPolicySettings(const PolicyMap& policies,
@@ skipping 31 matching lines @@
 
   // The ConfigurationPolicyHandler handlers for each default search policy.
   std::vector<std::unique_ptr<TypeCheckingPolicyHandler>> handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultSearchPolicyHandler);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_