[Parse] Remove unused ScopeKind

Author: rintaro

include/swift/Parse/Scope.h

@@ -67,13 +67,10 @@ enum class ScopeKind {
   StructBody,
   ClassBody,
   ProtocolBody,
-  ConstructorBody,
-  DestructorBody,
   InheritanceClause,
 
   Brace,
   TopLevel,
-  ForVars,
   ForeachVars,
   CaseVars,
   CatchVars,

lib/Parse/Scope.cpp

@@ -36,10 +36,7 @@ static bool isResolvableScope(ScopeKind SK) {
     return false;
   case ScopeKind::FunctionBody:
   case ScopeKind::Generics:
-  case ScopeKind::ConstructorBody:
-  case ScopeKind::DestructorBody:
   case ScopeKind::Brace:
-  case ScopeKind::ForVars:
   case ScopeKind::ForeachVars:
   case ScopeKind::ClosureParams:
   case ScopeKind::CaseVars: