delete unused variable

src/google/protobuf/descriptor.cc

@@ -226,8 +226,6 @@ struct PointerStringPairHash {
   }
 
   // Used only by MSVC and platforms where hash_map is not available.
-  static const size_t bucket_size = 4;
-  static const size_t min_buckets = 8;
   inline bool operator()(const PointerStringPair& a,
                          const PointerStringPair& b) const {
     if (a.first < b.first) return true;

src/google/protobuf/dynamic_message.cc

@@ -749,8 +749,6 @@ void DynamicMessageFactory::DeleteDefaultOneofInstance(
   for (int i = 0; i < type->oneof_decl_count(); i++) {
     for (int j = 0; j < type->oneof_decl(i)->field_count(); j++) {
       const FieldDescriptor* field = type->oneof_decl(i)->field(j);
-      void* field_ptr = reinterpret_cast<uint8*>(
-          default_oneof_instance) + offsets[field->index()];
       if (field->cpp_type() == FieldDescriptor::CPPTYPE_STRING) {
         switch (field->options().ctype()) {
           default: