[ic] Delete old KeyedLoadIC code

src/field-index.h

Index: src/field-index.h
diff --git a/src/field-index.h b/src/field-index.h
index ee7a9dc80b2406a5eec889cc59a605217d8eb48b..37b2f3c59d5a6f73fe57110201902c177f4b1776 100644
--- a/src/field-index.h
+++ b/src/field-index.h
@@ -27,7 +27,6 @@ class FieldIndex final {
   static FieldIndex ForInObjectOffset(int offset, Map* map = NULL);
   static FieldIndex ForDescriptor(Map* map, int descriptor_index);
   static FieldIndex ForLoadByFieldIndex(Map* map, int index);
-  static FieldIndex ForKeyedLookupCacheIndex(Map* map, int index);
   static FieldIndex FromFieldAccessStubKey(int key);
 
   int GetLoadByFieldIndex() const;
@@ -67,8 +66,6 @@ class FieldIndex final {
     return result;
   }
 
-  int GetKeyedLookupCacheIndex() const;
-
   int GetFieldAccessStubKey() const {
     return bit_field_ &
         (IsInObjectBits::kMask | IsDoubleBits::kMask | IndexBits::kMask);