Remove unused is_class_scope bit from Scope and ScopeInfo

src/scopeinfo.cc

Index: src/scopeinfo.cc
diff --git a/src/scopeinfo.cc b/src/scopeinfo.cc
index 8bc0a9a503440441b9ac99ffe2ae60d452c3a5cb..f77ef96ebac4cd8da6bd33f1bd58936a021f354f 100644
--- a/src/scopeinfo.cc
+++ b/src/scopeinfo.cc
@@ -89,7 +89,6 @@ Handle<ScopeInfo> ScopeInfo::Create(Isolate* isolate, Zone* zone,
               AsmModuleField::encode(scope->asm_module()) |
               AsmFunctionField::encode(scope->asm_function()) |
               IsSimpleParameterListField::encode(simple_parameter_list) |
-              BlockScopeIsClassScopeField::encode(scope->is_class_scope()) |
               FunctionKindField::encode(scope->function_kind());
   scope_info->SetFlags(flags);
   scope_info->SetParameterCount(parameter_count);
@@ -223,7 +222,6 @@ Handle<ScopeInfo> ScopeInfo::CreateGlobalThisBinding(Isolate* isolate) {
               FunctionVariableMode::encode(function_variable_mode) |
               AsmModuleField::encode(false) | AsmFunctionField::encode(false) |
               IsSimpleParameterListField::encode(simple_parameter_list) |
-              BlockScopeIsClassScopeField::encode(false) |
               FunctionKindField::encode(FunctionKind::kNormalFunction);
   scope_info->SetFlags(flags);
   scope_info->SetParameterCount(parameter_count);
@@ -567,11 +565,6 @@ int ScopeInfo::FunctionContextSlotIndex(String* name, VariableMode* mode) {
 }
 
 
-bool ScopeInfo::block_scope_is_class_scope() {
-  return BlockScopeIsClassScopeField::decode(Flags());
-}
-
-
 FunctionKind ScopeInfo::function_kind() {
   return FunctionKindField::decode(Flags());
 }