Minor clean-up

pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart

Index: pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart b/pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart
index 2af32d59aa373cd0b272803b5cd5ab4cced32612..903a9fd15cb4a5b5fba321d66278f640977b1b5a 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart/arglist_contributor.dart
@@ -223,17 +223,13 @@ class ArgListContributor extends DartCompletionContributor {
     for (ParameterElement parameter in parameters) {
       if (parameter.parameterKind == ParameterKind.NAMED) {
         _addNamedParameterSuggestion(
-            request, namedArgs, parameter, appendColon, appendComma);
+            namedArgs, parameter, appendColon, appendComma);
       }
     }
   }
 
-  void _addNamedParameterSuggestion(
-      DartCompletionRequest request,
-      List<String> namedArgs,
-      ParameterElement parameter,
-      bool appendColon,
-      bool appendComma) {
+  void _addNamedParameterSuggestion(List<String> namedArgs,
+      ParameterElement parameter, bool appendColon, bool appendComma) {
     String name = parameter.name;
     String type = parameter.type?.displayName;
     if (name != null && name.length > 0 && !namedArgs.contains(name)) {