Delete libSyntax

lib/SIL/Parser/ParseSIL.cpp

@@ -37,13 +37,11 @@
 #include "swift/SIL/SILUndef.h"
 #include "swift/SIL/TypeLowering.h"
 #include "swift/Subsystems.h"
-#include "swift/Syntax/SyntaxKind.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/SaveAndRestore.h"
 
 using namespace swift;
-using namespace swift::syntax;
 
 static llvm::cl::opt<bool>
 ParseSerializedSIL("parse-serialized-sil",
@@ -1944,7 +1942,6 @@ bool SILParser::parseSILBBArgsAtBranch(SmallVector<SILValue, 6> &Args,
     if (P.parseList(tok::r_paren, LParenLoc, RParenLoc,
                     /*AllowSepAfterLast=*/false,
                     diag::sil_basicblock_arg_rparen,
-                    SyntaxKind::Unknown,
                     [&]() -> ParserStatus {
                       SILValue Arg;
                       SourceLoc ArgLoc;