[compiler] Remove support for concurrent OSR.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index cb812642842c87aae945048874cab7cc827ee889..d70824aa4af157d7321c97ae7615b46440c2fb31 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -12247,14 +12247,6 @@ void JSFunction::AttemptConcurrentOptimization() {
     MarkForOptimization();
     return;
   }
-  if (isolate->concurrent_osr_enabled() &&
-      isolate->optimizing_compile_dispatcher()->IsQueuedForOSR(this)) {
-    // Do not attempt regular recompilation if we already queued this for OSR.
-    // TODO(yangguo): This is necessary so that we don't install optimized
-    // code on a function that is already optimized, since OSR and regular
-    // recompilation race.  This goes away as soon as OSR becomes one-shot.
-    return;
-  }
   DCHECK(!IsInOptimizationQueue());
   DCHECK(!IsOptimized());
   DCHECK(shared()->allows_lazy_compilation() ||