Remove unused variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147261 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-nm/llvm-nm.cpp b/tools/llvm-nm/llvm-nm.cpp
index 3e159c7..13356f8 100644
--- a/tools/llvm-nm/llvm-nm.cpp
+++ b/tools/llvm-nm/llvm-nm.cpp
@@ -335,7 +335,7 @@
       for (object::Archive::child_iterator i = a->begin_children(),
                                            e = a->end_children(); i != e; ++i) {
         OwningPtr<Binary> child;
-        if (error_code ec = i->getAsBinary(child)) {
+        if (i->getAsBinary(child)) {
           // Try opening it as a bitcode file.
           OwningPtr<MemoryBuffer> buff(i->getBuffer());
           Module *Result = 0;