Remove reference to non-existent function. NFC.

This comment is old. The code in question was removed in rL203174

Differential Revision: https://reviews.llvm.org/D57856

llvm-svn: 353352
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 619f706..7b4679e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1867,8 +1867,7 @@
 }
 
 /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each
-/// global in the specified llvm.used list for which emitUsedDirectiveFor
-/// is true, as being used with this directive.
+/// global in the specified llvm.used list.
 void AsmPrinter::EmitLLVMUsedList(const ConstantArray *InitList) {
   // Should be an array of 'i8*'.
   for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {