[Kernel] Remove code from the old type propagation.

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index 11d49a2aa67a47527b4fdc59f980e30c37c4efe6..64563eb27bd79e1f7c6b6f89ac18e8fa7c6f0ca0 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -133,16 +133,6 @@ class BinaryBuilder {
     return string.isEmpty ? null : string;
   }
 
-  InferredValue readOptionalInferredValue() {
-    if (readAndCheckOptionTag()) {
-      Reference baseClass = readClassReference(allowNull: true);
-      BaseClassKind baseClassKind = BaseClassKind.values[readByte()];
-      int valueBits = readByte();
-      return new InferredValue.byReference(baseClass, baseClassKind, valueBits);
-    }
-    return null;
-  }
-
   bool readAndCheckOptionTag() {
     int tag = readByte();
     if (tag == Tag.Nothing) {
@@ -453,7 +443,6 @@ class BinaryBuilder {
     var annotations = readAnnotationList(node);
     debugPath.add(node.name?.name ?? 'field');
     var type = readDartType();
-    var inferredValue = readOptionalInferredValue();
     var initializer = readExpressionOption();
     int transformerFlags = getAndResetTransformerFlags();
     debugPath.removeLast();
@@ -465,7 +454,6 @@ class BinaryBuilder {
       node.fileUri = fileUri;
       node.annotations = annotations;
       node.type = type;
-      node.inferredValue = inferredValue;
       node.initializer = initializer;
       node.initializer?.parent = node;
       node.transformerFlags = transformerFlags;
@@ -582,7 +570,6 @@ class BinaryBuilder {
     var positional = readAndPushVariableDeclarationList();
     var named = readAndPushVariableDeclarationList();
     var returnType = readDartType();
-    var inferredReturnValue = readOptionalInferredValue();
     int oldLabelStackBase = labelStackBase;
     labelStackBase = labelStack.length;
     var body = readStatementOption();
@@ -595,7 +582,6 @@ class BinaryBuilder {
         positionalParameters: positional,
         namedParameters: named,
         returnType: returnType,
-        inferredReturnValue: inferredReturnValue,
         asyncMarker: asyncMarker,
         dartAsyncMarker: dartAsyncMarker)
       ..fileOffset = offset
@@ -1127,7 +1113,6 @@ class BinaryBuilder {
     int flags = readByte();
     return new VariableDeclaration(readStringOrNullIfEmpty(),
         type: readDartType(),
-        inferredValue: readOptionalInferredValue(),
         initializer: readExpressionOption(),
         isFinal: flags & 0x1 != 0,
         isConst: flags & 0x2 != 0)