Remove lld toStringRef function.

I added the same function in llvm, so this is causing an
ambiguous symbol.

llvm-svn: 305412

lld/ELF/Strings.h

@@ -73,10 +73,6 @@ private:
 // name, it returns Optional::None.
 llvm::Optional<std::string> demangle(StringRef Name);
 
-inline StringRef toStringRef(ArrayRef<uint8_t> Arr) {
-  return {(const char *)Arr.data(), Arr.size()};
-}
-
 inline ArrayRef<uint8_t> toArrayRef(StringRef S) {
   return {(const uint8_t *)S.data(), S.size()};
 }