Update to match llvm r279473: remove ilist_*sentinel_traits.

Author: bob-wilson

include/swift/SIL/SILBasicBlock.h

@@ -45,7 +45,6 @@ public llvm::ilist_node<SILBasicBlock>, public SILAllocated<SILBasicBlock> {
   /// The ordered set of instructions in the SILBasicBlock.
   InstListType InstList;
 
-  friend struct llvm::ilist_sentinel_traits<SILBasicBlock>;
   friend struct llvm::ilist_traits<SILBasicBlock>;
   SILBasicBlock() : Parent(0) {}
   void operator=(const SILBasicBlock &) = delete;
@@ -316,10 +315,6 @@ namespace llvm {
 // ilist_traits for SILBasicBlock
 //===----------------------------------------------------------------------===//
 
-template <>
-struct ilist_sentinel_traits<::swift::SILBasicBlock> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILBasicBlock> {};
-
 template <>
 struct ilist_traits<::swift::SILBasicBlock> :
 public ilist_default_traits<::swift::SILBasicBlock> {

include/swift/SIL/SILCoverageMap.h

@@ -138,10 +138,6 @@ namespace llvm {
 // ilist_traits for SILCoverageMap
 //===----------------------------------------------------------------------===//
 
-template <>
-struct ilist_sentinel_traits<::swift::SILCoverageMap> :
-    public ilist_half_embedded_sentinel_traits<::swift::SILCoverageMap> {};
-
 template <>
 struct ilist_traits<::swift::SILCoverageMap> :
 public ilist_default_traits<::swift::SILCoverageMap> {

include/swift/SIL/SILDefaultWitnessTable.h

@@ -176,10 +176,6 @@ class SILDefaultWitnessTable : public llvm::ilist_node<SILDefaultWitnessTable>,
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILDefaultWitnessTable> :
-public ilist_half_embedded_sentinel_traits<::swift::SILDefaultWitnessTable> {};
-
 template <>
 struct ilist_traits<::swift::SILDefaultWitnessTable> :
 public ilist_default_traits<::swift::SILDefaultWitnessTable> {

include/swift/SIL/SILFunction.h

@@ -749,10 +749,6 @@ inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILFunction> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILFunction> {};
-
 template <>
 struct ilist_traits<::swift::SILFunction> :
 public ilist_default_traits<::swift::SILFunction> {

include/swift/SIL/SILGlobalVariable.h

@@ -196,10 +196,6 @@ inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILGlobalVariable> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILGlobalVariable> {};
-
 template <>
 struct ilist_traits<::swift::SILGlobalVariable> :
 public ilist_default_traits<::swift::SILGlobalVariable> {

include/swift/SIL/SILInstruction.h

@@ -69,7 +69,6 @@ class SILInstruction : public ValueBase,public llvm::ilist_node<SILInstruction>{
   /// used for debug info and diagnostics.
   SILDebugLocation Location;
 
-  friend struct llvm::ilist_sentinel_traits<SILInstruction>;
   SILInstruction() = delete;
   void operator=(const SILInstruction &) = delete;
   void operator delete(void *Ptr, size_t) = delete;
@@ -5432,10 +5431,6 @@ SILFunction *ApplyInstBase<Impl, Base, false>::getCalleeFunction() const {
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILInstruction> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILInstruction> {};
-
 template <>
 struct ilist_traits<::swift::SILInstruction> :
   public ilist_default_traits<::swift::SILInstruction> {

include/swift/SIL/SILVTable.h

@@ -113,10 +113,6 @@ class SILVTable : public llvm::ilist_node<SILVTable>,
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILVTable> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILVTable> {};
-
 template <>
 struct ilist_traits<::swift::SILVTable> :
 public ilist_default_traits<::swift::SILVTable> {

include/swift/SIL/SILWitnessTable.h

@@ -281,10 +281,6 @@ class SILWitnessTable : public llvm::ilist_node<SILWitnessTable>,
 
 namespace llvm {
 
-template <>
-struct ilist_sentinel_traits<::swift::SILWitnessTable> :
-  public ilist_half_embedded_sentinel_traits<::swift::SILWitnessTable> {};
-
 template <>
 struct ilist_traits<::swift::SILWitnessTable> :
 public ilist_default_traits<::swift::SILWitnessTable> {

lib/Sema/Constraint.h

@@ -582,10 +582,6 @@ class Constraint final : public llvm::ilist_node<Constraint>,
 namespace llvm {
 
 /// Specialization of \c ilist_traits for constraints.
-template<>
-struct ilist_sentinel_traits<swift::constraints::Constraint>
-  : public ilist_half_embedded_sentinel_traits<swift::constraints::Constraint> {};
-
 template<>
 struct ilist_traits<swift::constraints::Constraint>
          : public ilist_default_traits<swift::constraints::Constraint> {