[dart2wasm] Remove unnecessary initializer list collectContexts call

The `collectContexts(member)` already visits initializer lists when
visiting constructors, so no need to call it separately for
initializers.

Change-Id: Ida51a0e8c4003f19cd7b533a2847946926237bc0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/317101
Commit-Queue: Ömer Ağacan <omersa@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>

pkg/dart2wasm/lib/closures.dart

diff --git a/pkg/dart2wasm/lib/closures.dart b/pkg/dart2wasm/lib/closures.dart
index 5b96346..8f25963 100644
--- a/pkg/dart2wasm/lib/closures.dart
+++ b/pkg/dart2wasm/lib/closures.dart
@@ -1037,10 +1037,9 @@
     member.accept(find);
   }
 
-  void collectContexts(TreeNode node, {TreeNode? container}) {
+  void collectContexts(TreeNode node) {
     if (captures.isNotEmpty || isThisCaptured) {
-      node.accept(
-          ContextCollector(this, container, translator.options.enableAsserts));
+      node.accept(ContextCollector(this, translator.options.enableAsserts));
     }
   }
 
@@ -1240,11 +1239,7 @@
   Context? currentContext;
   final bool enableAsserts;
 
-  ContextCollector(this.closures, TreeNode? container, this.enableAsserts) {
-    if (container != null) {
-      currentContext = closures.contexts[container]!;
-    }
-  }
+  ContextCollector(this.closures, this.enableAsserts);
 
   @override
   void visitAssertStatement(AssertStatement node) {

pkg/dart2wasm/lib/code_generator.dart

diff --git a/pkg/dart2wasm/lib/code_generator.dart b/pkg/dart2wasm/lib/code_generator.dart
index 1ce4e1c..61cf122 100644
--- a/pkg/dart2wasm/lib/code_generator.dart
+++ b/pkg/dart2wasm/lib/code_generator.dart
@@ -354,14 +354,6 @@
 
     closures.findCaptures(member);
     closures.collectContexts(member);
-    if (member is Constructor) {
-      for (Field field in member.enclosingClass.fields) {
-        if (field.isInstanceMember && field.initializer != null) {
-          closures.collectContexts(field.initializer!,
-              container: member.function);
-        }
-      }
-    }
     closures.buildContexts();
 
     allocateContext(member.function!);