[Demangle] remove itaniumFindTypesInMangledName

Summary:
This (very specialized) function was added to enable an LLDB use case.
Now that a more generic interface (overriding of parser functions -
D52992)  is available, and LLDB has been converted to use that (D54074),
the function is unused and can be removed.

Reviewers: erik.pilkington, sgraenitz, rsmith

Subscribers: mgorny, hiraditya, christof, libcxx-commits, llvm-commits

Differential Revision: https://reviews.llvm.org/D54893

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347670 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Demangle/ItaniumDemangle.cpp

@@ -356,15 +356,6 @@ char *llvm::itaniumDemangle(const char *MangledName, char *Buf,
   return InternalStatus == demangle_success ? Buf : nullptr;
 }
 
-bool llvm::itaniumFindTypesInMangledName(const char *MangledName, void *Ctx,
-                                         void (*Callback)(void *,
-                                                          const char *)) {
-  Demangler Parser(MangledName, MangledName + std::strlen(MangledName));
-  Parser.TypeCallback = Callback;
-  Parser.TypeCallbackContext = Ctx;
-  return Parser.parse() == nullptr;
-}
-
 ItaniumPartialDemangler::ItaniumPartialDemangler()
     : RootNode(nullptr), Context(new Demangler{nullptr, nullptr}) {}