Revert "Reapply "Eliminate dependencies on assemblers and code stubs in precompiled runtime.""

runtime/vm/block_scheduler.cc

Index: runtime/vm/block_scheduler.cc
diff --git a/runtime/vm/block_scheduler.cc b/runtime/vm/block_scheduler.cc
index 00461d5fcd633630d11d57d1ca3a180125fe9794..afb129bf2b068881b574defcf3fd944029a01e40 100644
--- a/runtime/vm/block_scheduler.cc
+++ b/runtime/vm/block_scheduler.cc
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#if !defined(DART_PRECOMPILED_RUNTIME)
-
 #include "vm/block_scheduler.h"
 
 #include "vm/allocation.h"
@@ -211,5 +209,3 @@ void BlockScheduler::ReorderBlocks() const {
 }
 
 }  // namespace dart
-
-#endif  // !defined(DART_PRECOMPILED_RUNTIME)