Remove CheckedCastValue from Swift compiler sources.

Author: atrick

SwiftCompilerSources/Sources/SIL/Instruction.swift

@@ -408,12 +408,6 @@ class UnconditionalCheckedCastInst : SingleValueInstruction, UnaryInstruction {
   public override var mayTrap: Bool { true }
 }
 
-final public
-class UnconditionalCheckedCastValueInst : SingleValueInstruction,
-                                          UnaryInstruction {
-  public override var mayTrap: Bool { true }
-}
-
 final public
 class ConvertFunctionInst : SingleValueInstruction, UnaryInstruction {}
 
@@ -624,7 +618,3 @@ final public class CheckedCastBranchInst : TermInst, UnaryInstruction {
 
 final public class CheckedCastAddrBranchInst : TermInst, UnaryInstruction {
 }
-
-final public class CheckedCastValueBranchInst : TermInst, UnaryInstruction {
-}
-

SwiftCompilerSources/Sources/SIL/Registration.swift

@@ -92,7 +92,6 @@ public func registerSILClasses() {
   register(RefElementAddrInst.self)
   register(RefTailAddrInst.self)
   register(UnconditionalCheckedCastInst.self)
-  register(UnconditionalCheckedCastValueInst.self)
   register(ConvertFunctionInst.self)
   register(ThinToThickFunctionInst.self)
   register(ObjCExistentialMetatypeToObjectInst.self)
@@ -140,5 +139,4 @@ public func registerSILClasses() {
   register(AwaitAsyncContinuationInst.self)
   register(CheckedCastBranchInst.self)
   register(CheckedCastAddrBranchInst.self)
-  register(CheckedCastValueBranchInst.self)
 }