diff --git a/lldb/include/lldb/DataFormatters/TypeCategory.h b/lldb/include/lldb/DataFormatters/TypeCategory.h
--- a/lldb/include/lldb/DataFormatters/TypeCategory.h
+++ b/lldb/include/lldb/DataFormatters/TypeCategory.h
@@ -358,8 +358,6 @@
 
   void AddLanguage(lldb::LanguageType lang);
 
-  bool HasLanguage(lldb::LanguageType lang);
-
   std::string GetDescription();
 
   bool AnyMatches(ConstString type_name,
diff --git a/lldb/source/DataFormatters/TypeCategory.cpp b/lldb/source/DataFormatters/TypeCategory.cpp
--- a/lldb/source/DataFormatters/TypeCategory.cpp
+++ b/lldb/source/DataFormatters/TypeCategory.cpp
@@ -22,54 +22,6 @@
       m_validator_cont("validator", "regex-validator", clist), m_enabled(false),
       m_change_listener(clist), m_mutex(), m_name(name), m_languages() {}
 
-static bool IsApplicable(lldb::LanguageType category_lang,
-                         lldb::LanguageType valobj_lang) {
-  switch (category_lang) {
-  // Unless we know better, allow only exact equality.
-  default:
-    return category_lang == valobj_lang;
-
-  // the C family, we consider it as one
-  case eLanguageTypeC89:
-  case eLanguageTypeC:
-  case eLanguageTypeC99:
-    return valobj_lang == eLanguageTypeC89 || valobj_lang == eLanguageTypeC ||
-           valobj_lang == eLanguageTypeC99;
-
-  // ObjC knows about C and itself
-  case eLanguageTypeObjC:
-    return valobj_lang == eLanguageTypeC89 || valobj_lang == eLanguageTypeC ||
-           valobj_lang == eLanguageTypeC99 || valobj_lang == eLanguageTypeObjC;
-
-  // C++ knows about C and C++
-  case eLanguageTypeC_plus_plus:
-    return valobj_lang == eLanguageTypeC89 || valobj_lang == eLanguageTypeC ||
-           valobj_lang == eLanguageTypeC99 ||
-           valobj_lang == eLanguageTypeC_plus_plus;
-
-  // ObjC++ knows about C,C++,ObjC and ObjC++
-  case eLanguageTypeObjC_plus_plus:
-    return valobj_lang == eLanguageTypeC89 || valobj_lang == eLanguageTypeC ||
-           valobj_lang == eLanguageTypeC99 ||
-           valobj_lang == eLanguageTypeC_plus_plus ||
-           valobj_lang == eLanguageTypeObjC;
-
-  // Categories with unspecified language match everything.
-  case eLanguageTypeUnknown:
-    return true;
-  }
-}
-
-bool TypeCategoryImpl::IsApplicable(ValueObject &valobj) {
-  lldb::LanguageType valobj_lang = valobj.GetObjectRuntimeLanguage();
-  for (size_t idx = 0; idx < GetNumLanguages(); idx++) {
-    const lldb::LanguageType category_lang = GetLanguageAtIndex(idx);
-    if (::IsApplicable(category_lang, valobj_lang))
-      return true;
-  }
-  return false;
-}
-
 size_t TypeCategoryImpl::GetNumLanguages() {
   if (m_languages.empty())
     return 1;
@@ -86,16 +38,10 @@
   m_languages.push_back(lang);
 }
 
-bool TypeCategoryImpl::HasLanguage(lldb::LanguageType lang) {
-  const auto iter = std::find(m_languages.begin(), m_languages.end(), lang),
-             end = m_languages.end();
-  return (iter != end);
-}
-
 bool TypeCategoryImpl::Get(ValueObject &valobj,
                            const FormattersMatchVector &candidates,
                            lldb::TypeFormatImplSP &entry, uint32_t *reason) {
-  if (!IsEnabled() || !IsApplicable(valobj))
+  if (!IsEnabled())
     return false;
   if (GetTypeFormatsContainer()->Get(candidates, entry, reason))
     return true;
@@ -108,7 +54,7 @@
 bool TypeCategoryImpl::Get(ValueObject &valobj,
                            const FormattersMatchVector &candidates,
                            lldb::TypeSummaryImplSP &entry, uint32_t *reason) {
-  if (!IsEnabled() || !IsApplicable(valobj))
+  if (!IsEnabled())
     return false;
   if (GetTypeSummariesContainer()->Get(candidates, entry, reason))
     return true;
@@ -121,7 +67,7 @@
 bool TypeCategoryImpl::Get(ValueObject &valobj,
                            const FormattersMatchVector &candidates,
                            lldb::SyntheticChildrenSP &entry, uint32_t *reason) {
-  if (!IsEnabled() || !IsApplicable(valobj))
+  if (!IsEnabled())
     return false;
   TypeFilterImpl::SharedPointer filter_sp;
   uint32_t reason_filter = 0;