No need to call setIdentifierInfo() after LookUpIdentifierInfo() which LookUpIdentifierInfo() will automatically do

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98435 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/RewriteMacros.cpp b/lib/Frontend/RewriteMacros.cpp
index 0bcbd4f..954e8e2 100644
--- a/lib/Frontend/RewriteMacros.cpp
+++ b/lib/Frontend/RewriteMacros.cpp
@@ -79,7 +79,7 @@
     // up the indentifier info.  This is important for equality comparison of
     // identifier tokens.
     if (RawTok.is(tok::identifier) && !RawTok.getIdentifierInfo())
-      RawTok.setIdentifierInfo(PP.LookUpIdentifierInfo(RawTok));
+      PP.LookUpIdentifierInfo(RawTok);
 
     RawTokens.push_back(RawTok);
   } while (RawTok.isNot(tok::eof));