AST: Remove unused functions in FeatureSet.cpp.

Author: tshortli

lib/AST/ASTPrinter.cpp

@@ -3043,17 +3043,6 @@ static void suppressingFeatureSpecializeAttributeWithAvailability(
   action();
 }
 
-static void
-suppressingFeatureLexicalLifetimes(PrintOptions &options,
-                                   llvm::function_ref<void()> action) {
-  unsigned originalExcludeAttrCount = options.ExcludeAttrList.size();
-  options.ExcludeAttrList.push_back(DeclAttrKind::EagerMove);
-  options.ExcludeAttrList.push_back(DeclAttrKind::NoEagerMove);
-  options.ExcludeAttrList.push_back(DeclAttrKind::LexicalLifetimes);
-  action();
-  options.ExcludeAttrList.resize(originalExcludeAttrCount);
-}
-
 static void suppressingFeatureRetroactiveAttribute(
   PrintOptions &options,
   llvm::function_ref<void()> action) {

lib/AST/FeatureSet.cpp

@@ -138,20 +138,6 @@ static bool usesFeatureSpecializeAttributeWithAvailability(Decl *decl) {
   return false;
 }
 
-static bool hasParameterPacks(Decl *decl) {
-  if (auto genericContext = decl->getAsGenericContext()) {
-    auto sig = genericContext->getGenericSignature();
-    if (llvm::any_of(sig.getGenericParams(),
-                     [&](const GenericTypeParamType *GP) {
-                       return GP->isParameterPack();
-                     })) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
 static bool usesFeatureRetroactiveAttribute(Decl *decl) {
   auto ext = dyn_cast<ExtensionDecl>(decl);
   if (!ext)