Revert of Merge cellspace into old pointer space

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 1f3958d6464a3e6a4ebdf6988ebd2f0e773894cb..bf7e077fba206691d28c284e833fe4ab0f6a003c 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -229,6 +229,10 @@
   heap_stats.map_space_size = &map_space_size;
   intptr_t map_space_capacity;
   heap_stats.map_space_capacity = &map_space_capacity;
+  intptr_t cell_space_size;
+  heap_stats.cell_space_size = &cell_space_size;
+  intptr_t cell_space_capacity;
+  heap_stats.cell_space_capacity = &cell_space_capacity;
   intptr_t lo_space_size;
   heap_stats.lo_space_size = &lo_space_size;
   int global_handle_count;