Speculatively revert r94322 to see if it fixes darwin selfhost buildbot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94331 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/DeadArgElim/deadexternal.ll

@@ -1,12 +0,0 @@
-; RUN: opt -deadargelim -S %s | FileCheck %s
-
-define void @test(i32) {
-  ret void
-}
-
-define void @foo() {
-  call void @test(i32 0)
-  ret void
-; CHECK: @foo
-; CHECK: i32 undef
-}