move functional argument check into manager

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

Index: pkg/analysis_server/lib/src/services/completion/dart/local_reference_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart/local_reference_contributor.dart b/pkg/analysis_server/lib/src/services/completion/dart/local_reference_contributor.dart
index 4921e5f16f21f2d68f0455750ba7b1640eb2f12b..3d56c873792562172c17ea61c010e2e8b912eb1f 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart/local_reference_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart/local_reference_contributor.dart
@@ -38,18 +38,6 @@ class LocalReferenceContributor extends DartCompletionContributor {
       DartCompletionRequest request) async {
     OpType optype = (request as DartCompletionRequestImpl).opType;
 
-    // Resolve the expression in which the completion occurs
-    // to properly determine if identifiers should be suggested
-    // rather than invocations.
-    if (request.target.maybeFunctionalArgument()) {
-      Expression expression =
-          request.target.containingNode.getAncestor((p) => p is Expression);
-      if (expression != null) {
-        await request.resolveExpression(expression);
-        optype = (request as DartCompletionRequestImpl).opType;
-      }
-    }
-
     // Collect suggestions from the specific child [AstNode] that contains
     // the completion offset and all of its parents recursively.
     if (!optype.isPrefixed) {