Remove more feature in product mode

runtime/vm/locations.cc

Index: runtime/vm/locations.cc
diff --git a/runtime/vm/locations.cc b/runtime/vm/locations.cc
index de4f773a9b84efb30e134045733040b9eaf93abb..8a9499eb3c2b99793bead36c4a8d1a31d3de3e22 100644
--- a/runtime/vm/locations.cc
+++ b/runtime/vm/locations.cc
@@ -195,6 +195,9 @@ const char* Location::Name() const {
 
 
 void Location::PrintTo(BufferFormatter* f) const {
+  if (!FLAG_support_il_printer) {
+    return;
+  }
   if (kind() == kStackSlot) {
     f->Print("S%+" Pd "", stack_index());
   } else if (kind() == kDoubleStackSlot) {
@@ -297,6 +300,9 @@ Location Location::RemapForSlowPath(Definition* def,
 
 
 void LocationSummary::PrintTo(BufferFormatter* f) const {
+  if (!FLAG_support_il_printer) {
+    return;
+  }
   if (input_count() > 0) {
     f->Print(" (");
     for (intptr_t i = 0; i < input_count(); i++) {