Clean up flags for conditional directives

pkg/analyzer_cli/lib/src/options.dart

Index: pkg/analyzer_cli/lib/src/options.dart
diff --git a/pkg/analyzer_cli/lib/src/options.dart b/pkg/analyzer_cli/lib/src/options.dart
index fc778f471d57a7d149805238dd19f4bfc0b35f65..3f26109e5dc6ab852debfab02c78d52ebe97ea26 100644
--- a/pkg/analyzer_cli/lib/src/options.dart
+++ b/pkg/analyzer_cli/lib/src/options.dart
@@ -80,9 +80,6 @@ class CommandLineOptions {
   /// Whether to display version information
   final bool displayVersion;
 
-  /// Whether to enable conditional directives (DEP 40).
-  final bool enableConditionalDirectives;
-
   /// Whether to enable null-aware operators (DEP 9).
   final bool enableNullAwareOperators;
 
@@ -166,7 +163,6 @@ class CommandLineOptions {
         analysisOptionsFile = args['options'],
         disableHints = args['no-hints'],
         displayVersion = args['version'],
-        enableConditionalDirectives = args['enable-conditional-directives'],
         enableNullAwareOperators = args['enable-null-aware-operators'],
         enableStrictCallChecks = args['enable-strict-call-checks'],
         enableSuperMixins = args['supermixin'],
@@ -419,7 +415,8 @@ class CommandLineOptions {
           negatable: false,
           hide: true)
       ..addFlag('enable-conditional-directives',
-          help: 'Enable support for conditional directives (DEP 40).',
+          help:
+              'deprecated -- Enable support for conditional directives (DEP 40).',
           defaultsTo: false,
           negatable: false,
           hide: true)
@@ -434,7 +431,7 @@ class CommandLineOptions {
           negatable: false,
           hide: true)
       ..addFlag('enable-new-task-model',
-          help: 'Ennable new task model.',
+          help: 'deprecated -- Ennable new task model.',
           defaultsTo: false,
           negatable: false,
           hide: true)