Eliminatable CheckMaps replaced with if(true) or if(false).

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 49916687696b4d6b05cf4caf524bc74ce7e3db25..f4ee5a778ec340a0c59b654973d8a6d8d5a195ad 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -715,7 +715,6 @@ void HInstruction::PrintMnemonicTo(StringStream* stream) {
 
 void HInstruction::Unlink() {
   ASSERT(IsLinked());
-  ASSERT(!IsControlInstruction());  // Must never move control instructions.
   ASSERT(!IsBlockEntry());  // Doesn't make sense to delete these.
   ASSERT(previous_ != NULL);
   previous_->next_ = next_;