[libc++][NFC] Remove workaround for variadic templates in C++03

That's not necessary anymore, since we always build the dylib with
C++11 capabilities nowadays.

Differential Revision: https://reviews.llvm.org/D107772

NOKEYCHECK=True
GitOrigin-RevId: 706bd129b35c012860fd381482cfbc066e02639a
diff --git a/src/locale.cpp b/src/locale.cpp
index d5ab8fb..e590d5d 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -81,33 +81,11 @@
     void operator()(locale::facet* p) {p->__release_shared();}
 };
 
-template <class T, class A0>
-inline
-T&
-make(A0 a0)
+template <class T, class ...Args>
+T& make(Args ...args)
 {
     static typename aligned_storage<sizeof(T)>::type buf;
-    auto *obj = ::new (&buf) T(a0);
-    return *obj;
-}
-
-template <class T, class A0, class A1>
-inline
-T&
-make(A0 a0, A1 a1)
-{
-    static typename aligned_storage<sizeof(T)>::type buf;
-    ::new (&buf) T(a0, a1);
-    return *reinterpret_cast<T*>(&buf);
-}
-
-template <class T, class A0, class A1, class A2>
-inline
-T&
-make(A0 a0, A1 a1, A2 a2)
-{
-    static typename aligned_storage<sizeof(T)>::type buf;
-    auto *obj = ::new (&buf) T(a0, a1, a2);
+    auto *obj = ::new (&buf) T(args...);
     return *obj;
 }