[Parse] NFC: Remove recursive include

Author: hamishknight

include/swift/Parse/Token.h

@@ -19,7 +19,6 @@
 
 #include "swift/Basic/SourceLoc.h"
 #include "swift/Basic/LLVM.h"
-#include "swift/Parse/Token.h"
 #include "swift/Config.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"