Revert "Collect the types used in is-checks in the resolver phase."

lib/compiler/implementation/compiler.dart

Index: lib/compiler/implementation/compiler.dart
diff --git a/lib/compiler/implementation/compiler.dart b/lib/compiler/implementation/compiler.dart
index 977f9778a2038b8c1943cde074592c80e17a155d..690e7dbb87364e393da043e41b22430f405c9027 100644
--- a/lib/compiler/implementation/compiler.dart
+++ b/lib/compiler/implementation/compiler.dart
@@ -374,6 +374,9 @@ class Compiler implements DiagnosticListener {
     assertMethod = coreLibrary.find(const SourceString('assert'));
 
     initializeSpecialClasses();
+
+    //patchDartLibrary(coreLibrary, 'core');
+    //patchDartLibrary(coreImplLibrary, 'coreimpl');
   }
 
   void importCoreLibrary(LibraryElement library) {
@@ -576,11 +579,6 @@ class Compiler implements DiagnosticListener {
 
     if (compilationFailed) return;
 
-    // TODO(karlklose): also take the instantiated types into account and move
-    // this computation to before codegen.
-    enqueuer.codegen.universe.computeRequiredTypes(
-        enqueuer.resolution.universe.isChecks);
-
     backend.assembleProgram();
 
     checkQueues();