Revert "cps-ir: Support foreign code."

pkg/compiler/lib/src/cps_ir/type_propagation.dart

Index: pkg/compiler/lib/src/cps_ir/type_propagation.dart
diff --git a/pkg/compiler/lib/src/cps_ir/type_propagation.dart b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
index 20e06b2a49e90d2621e434bd92067e0ab62c0462..ac10ae7414dbb6e7f3c3f5f07376a473dd282629 100644
--- a/pkg/compiler/lib/src/cps_ir/type_propagation.dart
+++ b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
@@ -1280,7 +1280,7 @@ class TypePropagationVisitor implements Visitor {
   }
 
   void visitCreateInstance(CreateInstance node) {
-    setValue(node, nonConstant(typeSystem.nonNullExact(node.classElement.declaration)));
+    setValue(node, nonConstant(typeSystem.nonNullExact(node.classElement)));
   }
 
   void visitReifyRuntimeType(ReifyRuntimeType node) {
@@ -1304,17 +1304,6 @@ class TypePropagationVisitor implements Visitor {
     // TODO(asgerf): Expose [Invocation] type.
     setValue(node, nonConstant(typeSystem.nonNullType));
   }
-
-  @override
-  visitForeignCode(ForeignCode node) {
-    Continuation continuation = node.continuation.definition;
-    setReachable(continuation);
-
-    assert(continuation.parameters.length == 1);
-    Parameter returnValue = continuation.parameters.first;
-
-    setValue(returnValue, nonConstant(node.type));
-  }
 }
 
 /// Represents the abstract value of a primitive value at some point in the