Revert "Various redemptions"

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

Index: pkg/compiler/lib/src/kernel/env.dart
diff --git a/pkg/compiler/lib/src/kernel/env.dart b/pkg/compiler/lib/src/kernel/env.dart
index 845feeec36a793d77bbc7996ca85053d0506bb97..af566a0e9ab129f98428fc2832a5e276d3a7b1c9 100644
--- a/pkg/compiler/lib/src/kernel/env.dart
+++ b/pkg/compiler/lib/src/kernel/env.dart
@@ -563,14 +563,11 @@ class ConstructorDataImpl extends FunctionDataImpl implements ConstructorData {
 }
 
 abstract class FieldData extends MemberData {
-  DartType getFieldType(KernelToElementMap elementMap);
-
   ConstantExpression getFieldConstant(
       KernelToElementMapBase elementMap, FieldEntity field);
 }
 
 class FieldDataImpl extends MemberDataImpl implements FieldData {
-  DartType _type;
   ConstantExpression _constant;
 
   FieldDataImpl(ir.Field node, MemberDefinition definition)
@@ -578,10 +575,6 @@ class FieldDataImpl extends MemberDataImpl implements FieldData {
 
   ir.Field get node => super.node;
 
-  DartType getFieldType(covariant KernelToElementMapBase elementMap) {
-    return _type ??= elementMap.getDartType(node.type);
-  }
-
   ConstantExpression getFieldConstant(
       KernelToElementMapBase elementMap, FieldEntity field) {
     if (_constant == null) {