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diff --git a/third_party/protobuf/src/google/protobuf/compiler/objectivec/objectivec_helpers.h b/third_party/protobuf/src/google/protobuf/compiler/objectivec/objectivec_helpers.h
deleted file mode 100644
index 072a2e57c5..0000000000
--- a/third_party/protobuf/src/google/protobuf/compiler/objectivec/objectivec_helpers.h
+++ /dev/null
@@ -1,175 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_HELPERS_H__
-#define GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_HELPERS_H__
-
-#include <string>
-#include <vector>
-
-#include <google/protobuf/descriptor.h>
-#include <google/protobuf/descriptor.pb.h>
-
-namespace google {
-namespace protobuf {
-namespace compiler {
-namespace objectivec {
-
-// Strips ".proto" or ".protodevel" from the end of a filename.
-string StripProto(const string& filename);
-
-// Returns true if the name requires a ns_returns_not_retained attribute applied
-// to it.
-bool IsRetainedName(const string& name);
-
-// Returns true if the name starts with "init" and will need to have special
-// handling under ARC.
-bool IsInitName(const string& name);
-
-// Gets the name of the file we're going to generate (sans the .pb.h
-// extension).  This does not include the path to that file.
-string FileName(const FileDescriptor* file);
-
-// Gets the path of the file we're going to generate (sans the .pb.h
-// extension).  The path will be dependent on the objectivec package
-// declared in the proto package.
-string FilePath(const FileDescriptor* file);
-
-// Gets the name of the root class we'll generate in the file.  This class
-// is not meant for external consumption, but instead contains helpers that
-// the rest of the the classes need
-string FileClassName(const FileDescriptor* file);
-
-// These return the fully-qualified class name corresponding to the given
-// descriptor.
-string ClassName(const Descriptor* descriptor);
-string EnumName(const EnumDescriptor* descriptor);
-
-// Returns the fully-qualified name of the enum value corresponding to the
-// the descriptor.
-string EnumValueName(const EnumValueDescriptor* descriptor);
-
-// Returns the name of the enum value corresponding to the descriptor.
-string EnumValueShortName(const EnumValueDescriptor* descriptor);
-
-// Reverse what an enum does.
-string UnCamelCaseEnumShortName(const string& name);
-
-// Returns the name to use for the extension (used as the method off the file's
-// Root class).
-string ExtensionMethodName(const FieldDescriptor* descriptor);
-
-// Returns the transformed field name.
-string FieldName(const FieldDescriptor* field);
-string FieldNameCapitalized(const FieldDescriptor* field);
-
-// Returns the transformed oneof name.
-string OneofEnumName(const OneofDescriptor* descriptor);
-string OneofName(const OneofDescriptor* descriptor);
-string OneofNameCapitalized(const OneofDescriptor* descriptor);
-
-inline bool HasFieldPresence(const FileDescriptor* file) {
-  return file->syntax() != FileDescriptor::SYNTAX_PROTO3;
-}
-
-inline bool HasPreservingUnknownEnumSemantics(const FileDescriptor* file) {
-  return file->syntax() == FileDescriptor::SYNTAX_PROTO3;
-}
-
-inline bool IsMapEntryMessage(const Descriptor* descriptor) {
-  return descriptor->options().map_entry();
-}
-
-// Reverse of the above.
-string UnCamelCaseFieldName(const string& name, const FieldDescriptor* field);
-
-enum ObjectiveCType {
-  OBJECTIVECTYPE_INT32,
-  OBJECTIVECTYPE_UINT32,
-  OBJECTIVECTYPE_INT64,
-  OBJECTIVECTYPE_UINT64,
-  OBJECTIVECTYPE_FLOAT,
-  OBJECTIVECTYPE_DOUBLE,
-  OBJECTIVECTYPE_BOOLEAN,
-  OBJECTIVECTYPE_STRING,
-  OBJECTIVECTYPE_DATA,
-  OBJECTIVECTYPE_ENUM,
-  OBJECTIVECTYPE_MESSAGE
-};
-
-string GetCapitalizedType(const FieldDescriptor* field);
-
-ObjectiveCType GetObjectiveCType(FieldDescriptor::Type field_type);
-
-inline ObjectiveCType GetObjectiveCType(const FieldDescriptor* field) {
-  return GetObjectiveCType(field->type());
-}
-
-bool IsPrimitiveType(const FieldDescriptor* field);
-bool IsReferenceType(const FieldDescriptor* field);
-
-string GPBGenericValueFieldName(const FieldDescriptor* field);
-string DefaultValue(const FieldDescriptor* field);
-
-string BuildFlagsString(const vector<string>& strings);
-
-string BuildCommentsString(const SourceLocation& location);
-
-// Checks the prefix for a given file and outputs any warnings needed, if
-// there are flat out errors, then out_error is filled in and the result is
-// false.
-bool ValidateObjCClassPrefix(const FileDescriptor* file, string *out_error);
-
-// Generate decode data needed for ObjC's GPBDecodeTextFormatName() to transform
-// the input into the the expected output.
-class LIBPROTOC_EXPORT TextFormatDecodeData {
- public:
-  TextFormatDecodeData() {}
-
-  void AddString(int32 key, const string& input_for_decode,
-                 const string& desired_output);
-  size_t num_entries() const { return entries_.size(); }
-  string Data() const;
-
-  static string DecodeDataForString(const string& input_for_decode,
-                                    const string& desired_output);
-
- private:
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(TextFormatDecodeData);
-
-  typedef std::pair<int32, string> DataEntry;
-  vector<DataEntry> entries_;
-};
-
-}  // namespace objectivec
-}  // namespace compiler
-}  // namespace protobuf
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_HELPERS_H__