Revert "Handle HCheckInstanceType and HIsStringAndBranch in check elimination."

src/hydrogen-check-elimination.h

Index: src/hydrogen-check-elimination.h
diff --git a/src/hydrogen-check-elimination.h b/src/hydrogen-check-elimination.h
index 9f3b198c6f708f750c6976fe0f986b7bfbeb96b1..b38447b1e7b43235ab279be130d0d372cd46b3a3 100644
--- a/src/hydrogen-check-elimination.h
+++ b/src/hydrogen-check-elimination.h
@@ -16,20 +16,11 @@ namespace internal {
 class HCheckEliminationPhase : public HPhase {
  public:
   explicit HCheckEliminationPhase(HGraph* graph)
-      : HPhase("H_Check Elimination", graph), aliasing_(),
-        string_maps_(kStringMapsSize, zone()) {
-    // Compute the set of string maps.
-    #define ADD_STRING_MAP(type, size, name, Name)                  \
-      string_maps_.Add(Unique<Map>::CreateImmovable(                \
-              graph->isolate()->factory()->name##_map()), zone());
-    STRING_TYPE_LIST(ADD_STRING_MAP)
-    #undef ADD_STRING_MAP
-    ASSERT_EQ(kStringMapsSize, string_maps_.size());
+      : HPhase("H_Check Elimination", graph), aliasing_() {
 #ifdef DEBUG
     redundant_ = 0;
     removed_ = 0;
     removed_cho_ = 0;
-    removed_cit_ = 0;
     narrowed_ = 0;
     loads_ = 0;
     empty_ = 0;
@@ -44,20 +35,13 @@ class HCheckEliminationPhase : public HPhase {
   friend class HCheckTable;
 
  private:
-  const UniqueSet<Map>* string_maps() const { return &string_maps_; }
-
   void PrintStats();
 
   HAliasAnalyzer* aliasing_;
-  #define COUNT(type, size, name, Name) + 1
-  static const int kStringMapsSize = 0 STRING_TYPE_LIST(COUNT);
-  #undef COUNT
-  UniqueSet<Map> string_maps_;
 #ifdef DEBUG
   int redundant_;
   int removed_;
   int removed_cho_;
-  int removed_cit_;
   int narrowed_;
   int loads_;
   int empty_;