[runtime] Simplify TO_INT32/TO_UINT32 abstract operations.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 0d7da9186859dd1fa1058926cb6601306f24d4b5..408641be967487153fcdc4f16fd8483e95315035 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -104,8 +104,6 @@ enum BindingFlags {
   V(TO_STRING_FUN_INDEX, JSFunction, to_string_fun)                            \
   V(TO_DETAIL_STRING_FUN_INDEX, JSFunction, to_detail_string_fun)              \
   V(TO_INTEGER_FUN_INDEX, JSFunction, to_integer_fun)                          \
-  V(TO_UINT32_FUN_INDEX, JSFunction, to_uint32_fun)                            \
-  V(TO_INT32_FUN_INDEX, JSFunction, to_int32_fun)                              \
   V(TO_LENGTH_FUN_INDEX, JSFunction, to_length_fun)                            \
   V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun)                        \
   V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun)                      \
@@ -374,9 +372,6 @@ class Context: public FixedArray {
     TO_STRING_FUN_INDEX,
     TO_DETAIL_STRING_FUN_INDEX,
     TO_INTEGER_FUN_INDEX,
-    TO_UINT32_FUN_INDEX,
-    TO_INT32_FUN_INDEX,
-    TO_BOOLEAN_FUN_INDEX,
     GLOBAL_EVAL_FUN_INDEX,
     ARRAY_BUFFER_FUN_INDEX,
     ARRAY_BUFFER_MAP_INDEX,