Revert "Add support for building patched_sdk and platform.dill for dart2js:"

pkg/front_end/lib/src/fasta/kernel/kernel_target.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
index 937c4e16d79076fcd7548b3758f420878fa07500..c273be8460159720aecda58386bcd5956d73a098 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -270,8 +270,10 @@ class KernelTarget extends TargetImplementation {
       loader.finishStaticInvocations();
       finishAllConstructors();
       loader.finishNativeMethods();
-      runBuildTransformations();
-
+      transformMixinApplications();
+      // TODO(ahe): Don't call this from two different places.
+      setup_builtin_library.transformProgram(program);
+      otherTransformations();
       if (dumpIr) this.dumpIr();
       if (verify) this.verify();
       errors.addAll(loader.collectCompileTimeErrors().map((e) => e.format()));
@@ -387,7 +389,7 @@ class KernelTarget extends TargetImplementation {
       }
     }
     if (errors.isEmpty || dillTarget.isLoaded) {
-      runLinkTransformations(program);
+      setup_builtin_library.transformProgram(program);
     }
     ticker.logMs("Linked program");
     return program;
@@ -675,20 +677,6 @@ class KernelTarget extends TargetImplementation {
     });
   }
 
-  /// Run all transformations that are needed when building a program for the
-  /// first time.
-  void runBuildTransformations() {
-    transformMixinApplications();
-    // TODO(ahe): Don't call this from two different places.
-    setup_builtin_library.transformProgram(program);
-    otherTransformations();
-  }
-
-  /// Run all transformations that are needed when linking a program.
-  void runLinkTransformations(Program program) {
-    setup_builtin_library.transformProgram(program);
-  }
-
   void transformMixinApplications() {
     new MixinFullResolution().transform(program);
     ticker.logMs("Transformed mixin applications");