[lldb] Remove include of non-existent header (NFC)

Author: kastiglione

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp

@@ -11,7 +11,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h"
-#include "Plugins/LanguageRuntime/Swift/SwiftLanguageRuntimeImpl.h"
 #include "Plugins/TypeSystem/Swift/SwiftASTContext.h"
 #include "Plugins/TypeSystem/Swift/SwiftDWARFImporterForClangTypes.h"
 #include "Plugins/TypeSystem/Swift/SwiftDemangle.h"