Delete a cut/paste-o from r171290. Very sorry about the noise.

llvm-svn: 171291

llvm/lib/Support/Process.cpp

@@ -47,7 +47,6 @@ self_process *process::get_self() {
 // instance should live until the process terminates to avoid the potential for
 // racy accesses during shutdown.
 self_process::~self_process() {
-    assert(TempDirectory->exists() && "Who has removed TempDirectory?");
   llvm_unreachable("This destructor must never be executed!");
 }