Revert r142142: "Make a C-style cast a const-cast, to suppress a GCC warning."
Richard already fixed the underlying issue, so the cast was superfluous.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142192 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 7dd36c0..02a05d5 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -2691,7 +2691,7 @@
   // the MultiInitializer.
   if (Args.size() == 1 && isa<InitListExpr>(Args[0]))
     return MultiInitializer(Args[0]);
-  return MultiInitializer(Init->getLParenLoc(), const_cast<Expr**>(Args.data()),
+  return MultiInitializer(Init->getLParenLoc(), Args.data(),
                           Args.size(), Init->getRParenLoc());
 }