[CS] NFC: Remove CTP_ComposedPropertyWrapper

This has been unused since we added a custom `AllowWrappedValueMismatch`
fix.

Author: hamishknight

include/swift/Sema/ConstraintLocator.h

@@ -77,8 +77,6 @@ enum ContextualTypePurpose : uint8_t {
                         ///  to a type of a switch subject or an `Error` type.
   CTP_ForEachSequence,  ///< Sequence expression associated with `for-in` loop.
   CTP_WrappedProperty,  ///< Property type expected to match 'wrappedValue' type
-  CTP_ComposedPropertyWrapper, ///< Composed wrapper type expected to match
-                               ///< former 'wrappedValue' type
 
   CTP_SingleValueStmtBranch, ///< The contextual type for a branch in a single
                              ///< value statement expression.

lib/Sema/CSApply.cpp

@@ -9616,7 +9616,6 @@ ExprWalker::rewriteTarget(SyntacticElementTarget target) {
     case CTP_SubscriptAssignSource:
     case CTP_Condition:
     case CTP_WrappedProperty:
-    case CTP_ComposedPropertyWrapper:
     case CTP_CannotFail:
     case CTP_SingleValueStmtBranch:
       result.setExpr(rewrittenExpr);

lib/Sema/CSDiagnostics.cpp

@@ -863,7 +863,6 @@ GenericArgumentsMismatchFailure::getDiagnosticFor(
   case CTP_CaseStmt:
   case CTP_ThrowStmt:
   case CTP_ForEachSequence:
-  case CTP_ComposedPropertyWrapper:
   case CTP_Unused:
   case CTP_CannotFail:
   case CTP_YieldByReference:
@@ -2965,7 +2964,6 @@ getContextualNilDiagnostic(ContextualTypePurpose CTP) {
   case CTP_ForEachSequence:
   case CTP_YieldByReference:
   case CTP_WrappedProperty:
-  case CTP_ComposedPropertyWrapper:
   case CTP_ExprPattern:
   case CTP_SingleValueStmtBranch:
     return std::nullopt;
@@ -3750,7 +3748,6 @@ ContextualFailure::getDiagnosticFor(ContextualTypePurpose context,
 
   case CTP_ThrowStmt:
   case CTP_ForEachSequence:
-  case CTP_ComposedPropertyWrapper:
   case CTP_Unused:
   case CTP_CannotFail:
   case CTP_YieldByReference:

lib/Sema/CSSimplify.cpp

@@ -16711,7 +16711,6 @@ void ConstraintSystem::addContextualConversionConstraint(
   case CTP_CoerceOperand:
   case CTP_SubscriptAssignSource:
   case CTP_WrappedProperty:
-  case CTP_ComposedPropertyWrapper:
   case CTP_ExprPattern:
   case CTP_SingleValueStmtBranch:
     break;

lib/Sema/SyntacticElementTarget.cpp

@@ -273,7 +273,6 @@ bool SyntacticElementTarget::contextualTypeIsOnlyAHint() const {
   case CTP_SubscriptAssignSource:
   case CTP_Condition:
   case CTP_WrappedProperty:
-  case CTP_ComposedPropertyWrapper:
   case CTP_CannotFail:
   case CTP_ExprPattern:
   case CTP_SingleValueStmtBranch: