Get rid of call to StringRef::substr that's never used.

Summary: substr doesn't modify the string, so this line has no effect.

Reviewers: majnemer

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D22540

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276057 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/CommandLine.cpp

@@ -505,7 +505,6 @@ static bool CommaSeparateAndAddOccurrence(Option *Handler, unsigned pos,
         return true;
       // Erase the portion before the comma, AND the comma.
       Val = Val.substr(Pos + 1);
-      Value.substr(Pos + 1); // Increment the original value pointer as well.
       // Check for another comma.
       Pos = Val.find(',');
     }