Drop obsolete dont_optimize compiler hint.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 90e6fbbb19a2b64b265872894ad4b309e27467b8..6a53ea0cc5544f351d125b725cc516cabaddc526 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7566,7 +7566,7 @@ int HOptimizedGraphBuilder::InliningAstSize(Handle<JSFunction> target) {
     TraceInline(target, caller, "target not inlineable");
     return kNotInlinable;
   }
-  if (target_shared->dont_inline() || target_shared->dont_optimize()) {
+  if (target_shared->dont_inline()) {
     TraceInline(target, caller, "target contains unsupported syntax [early]");
     return kNotInlinable;
   }