Revert r12342 "Flush monomorphic ICs on context disposal instead of context exit." because of canar…

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index ae9791469415d756d48e334684814eeb061957c9..e2ab81a8698e56a99d462e78a27c43de3844791a 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1074,10 +1074,7 @@ class Heap {
   void EnsureHeapIsIterable();
 
   // Notify the heap that a context has been disposed.
-  int NotifyContextDisposed() {
-    flush_monomorphic_ics_ = true;
-    return ++contexts_disposed_;
-  }
+  int NotifyContextDisposed() { return ++contexts_disposed_; }
 
   // Utility to invoke the scavenger. This is needed in test code to
   // ensure correct callback for weak global handles.
@@ -1607,8 +1604,6 @@ class Heap {
     global_ic_age_ = (global_ic_age_ + 1) & SharedFunctionInfo::ICAgeBits::kMax;
   }
 
-  bool flush_monomorphic_ics() { return flush_monomorphic_ics_; }
-
   intptr_t amount_of_external_allocated_memory() {
     return amount_of_external_allocated_memory_;
   }
@@ -1694,8 +1689,6 @@ class Heap {
 
   int global_ic_age_;
 
-  bool flush_monomorphic_ics_;
-
   int scan_on_scavenge_pages_;
 
 #if defined(V8_TARGET_ARCH_X64)