Remove _nodeToEntity and _nodeToThisLocal from CapturedScopeBuilder

pkg/compiler/lib/src/kernel/element_map.dart

Index: pkg/compiler/lib/src/kernel/element_map.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map.dart b/pkg/compiler/lib/src/kernel/element_map.dart
index db9fae41092e53e9a00e5f25f550af46318b4d9e..dfe03f77692fc02804ff95863e856733becffe44 100644
--- a/pkg/compiler/lib/src/kernel/element_map.dart
+++ b/pkg/compiler/lib/src/kernel/element_map.dart
@@ -65,6 +65,7 @@ abstract class KernelToElementMap {
 
   /// Returns the [Local] corresponding to the [node]. The node must be either
   /// a [ir.FunctionDeclaration] or [ir.FunctionExpression].
+  // TODO(johnniwinther): Move this to [KernelToElementMapForImpact].
   Local getLocalFunction(ir.TreeNode node);
 
   /// Returns the super [MemberEntity] for a super invocation, get or set of
@@ -361,6 +362,7 @@ abstract class KernelToTypeInferenceMap {
 }
 
 /// Map from kernel IR nodes to local entities.
+// TODO(johnniwinther): Add `getLocalFunction`.
 abstract class KernelToLocalsMap {
   /// The member currently being built.
   MemberEntity get currentMember;