[lldb][NFC] Remote reference to Swift in DWARFASTParser::Kind enum

(cherry picked from commit 2500e7f)

Author: augusto2112

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParser.h

@@ -26,7 +26,7 @@ class SymbolFileDWARF;
 
 class DWARFASTParser {
 public:
-  enum class Kind { DWARFASTParserClang, DWARFASTParserSwift };
+  enum class Kind { DWARFASTParserClang };
   DWARFASTParser(Kind kind) : m_kind(kind) {}
 
   virtual ~DWARFASTParser() = default;