Don't serialize local variables.

pkg/analyzer/lib/src/dart/element/element.dart

Index: pkg/analyzer/lib/src/dart/element/element.dart
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index 2da9fd6d06c337ba892382898451c93bfc9067a1..b8851f9beb26ac3217bb3a116b6e70502c1454e1 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -3792,22 +3792,6 @@ abstract class ExecutableElementImpl extends ElementImpl
 
   @override
   List<LocalVariableElement> get localVariables {
-    if (serializedExecutable != null && _localVariables == null) {
-      List<UnlinkedVariable> unlinkedVariables =
-          serializedExecutable.localVariables;
-      int length = unlinkedVariables.length;
-      if (length != 0) {
-        List<LocalVariableElementImpl> localVariables =
-            new List<LocalVariableElementImpl>(length);
-        for (int i = 0; i < length; i++) {
-          localVariables[i] = new LocalVariableElementImpl.forSerializedFactory(
-              unlinkedVariables[i], this);
-        }
-        _localVariables = localVariables;
-      } else {
-        _localVariables = const <LocalVariableElement>[];
-      }
-    }
     return _localVariables ?? const <LocalVariableElement>[];
   }