Remove dead code. Fixes pr20544.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215243 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/Unix/Path.inc

@@ -272,19 +272,6 @@ std::error_code create_directory(const Twine &path, bool IgnoreExisting) {
   return std::error_code();
 }
 
-std::error_code normalize_separators(SmallVectorImpl<char> &Path) {
-  for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
-    if (*PI == '\\') {
-      auto PN = PI + 1;
-      if (PN < PE && *PN == '\\')
-        ++PI; // increment once, the for loop will move over the escaped slash
-      else
-        *PI = '/';
-    }
-  }
-  return std::error_code();
-}
-
 // Note that we are using symbolic link because hard links are not supported by
 // all filesystems (SMB doesn't).
 std::error_code create_link(const Twine &to, const Twine &from) {