revert changes to eNoArgs

Author: charles-zablit

lldb/source/Plugins/Language/Swift/SwiftLanguage.cpp

@@ -1706,7 +1706,13 @@ bool SwiftLanguage::GetFunctionDisplayName(
     // No need to customize this.
     return false;
   case Language::FunctionNameRepresentation::eNameWithNoArgs: {
-    std::string display_name = GetFunctionName(sc, exe_ctx);
+    if (!sc.function)
+      return false;
+    if (sc.function->GetLanguage() != eLanguageTypeSwift)
+      return false;
+    std::string display_name = SwiftLanguageRuntime::DemangleSymbolAsString(
+        sc.function->GetMangled().GetMangledName().GetStringRef(),
+        SwiftLanguageRuntime::eSimplified, &sc, exe_ctx);
     if (display_name.empty())
       return false;
     s << display_name;