[Clang importer] Delete a redundant attribute-import operation.

Author: DougGregor

lib/ClangImporter/ImportDecl.cpp

@@ -2736,8 +2736,6 @@ namespace {
                                       importedName,
                                       {decl->param_begin(), decl->param_size()},
                                       decl->isVariadic(), redundant);
-      if (result)
-        Impl.importAttributes(decl, result);
 
       if ((result || redundant) && member) {
         ++NumFactoryMethodsAsInitializers;