net: Cleanup class/struct forward declarations

net/cert/internal/cert_errors.h

 // Copyright 2016 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.
 
 // ----------------------------
 // Overview of error design
 // ----------------------------
 //
 // Certificate path validation/parsing may emit a sequence of
 // errors/warnings/context. These are represented by a tree of CertErrorNodes.
@@ skipping 57 matching lines @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "net/base/net_export.h"
 #include "net/cert/internal/cert_error_id.h"
 
 namespace net {
 
 class CertErrorParams;
 class CertErrorScoper;
-class ParsedCertificate;
 
 // The type of a particular CertErrorNode.
 enum class CertErrorNodeType {
   // Note the TYPE_ prefix is to avoid compile errors. Because ERROR() is a
   // commonly used macro name.
 
   // Node that represents a single error.
   TYPE_ERROR,
 
   // Node that represents a single non-fatal error.
@@ skipping 66 matching lines @@
   // The top-most CertErrorScoper that is currently in scope (and which affects
   // the parent node for newly added errors).
   CertErrorScoper* current_scoper_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(CertErrors);
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_INTERNAL_CERT_ERRORS_H_