[WebAssembly] Remove redundant function: addSyntheticUndefinedFunction.  NFC.

Differential Revision: https://reviews.llvm.org/D42327

llvm-svn: 323024
diff --git a/lld/wasm/SymbolTable.cpp b/lld/wasm/SymbolTable.cpp
index a21ed831..745c4b0 100644
--- a/lld/wasm/SymbolTable.cpp
+++ b/lld/wasm/SymbolTable.cpp
@@ -187,6 +187,7 @@
 
 Symbol *SymbolTable::addUndefinedFunction(StringRef Name,
                                           const WasmSignature *Type) {
+  DEBUG(dbgs() << "addUndefinedFunction: " << Name << "\n");
   Symbol *S;
   bool WasInserted;
   std::tie(S, WasInserted) = insert(Name);