Revert of [esnext] ship --harmony-object-values-entries (patchset #1 id:1 of...

Revert of [esnext] ship --harmony-object-values-entries (patchset #1 id:1 of https://codereview.chromium.org/2116053003/ )

Reason for revert:
Revert to see if it addresses the performance regression observed in chromium:625956 in automated graphs

Original issue's description:
> [esnext] ship --harmony-object-values-entries
>
> BUG=v8:4663
> R=littledan@chromium.org, adamk@chromium.org
>
> Committed: https://crrev.com/ab529234853a1768642f8f6c907aaaa5ea8b19bf
> Cr-Commit-Position: refs/heads/master@{#37485}

TBR=adamk@chromium.org,caitpotter88@gmail.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:4663

Review-Url: https://codereview.chromium.org/2129533004
Cr-Commit-Position: refs/heads/master@{#37566}

src/flag-definitions.h

@@ -216,6 +216,7 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
 #define HARMONY_STAGED_BASE(V)                                               \
   V(harmony_regexp_lookbehind, "harmony regexp lookbehind")                  \
   V(harmony_tailcalls, "harmony tail calls")                                 \
+  V(harmony_object_values_entries, "harmony Object.values / Object.entries") \
   V(harmony_object_own_property_descriptors,                                 \
     "harmony Object.getOwnPropertyDescriptors()")                            \
   V(harmony_async_await, "harmony async-await")                              \
@@ -233,8 +234,7 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
 #define HARMONY_SHIPPING(V)                                           \
   V(harmony_restrictive_declarations,                                 \
     "harmony limitations on sloppy mode function declarations")       \
-  V(harmony_exponentiation_operator, "harmony exponentiation operator `**`") \
-  V(harmony_object_values_entries, "harmony Object.values / Object.entries")
+  V(harmony_exponentiation_operator, "harmony exponentiation operator `**`")
 
 // Once a shipping feature has proved stable in the wild, it will be dropped
 // from HARMONY_SHIPPING, all occurrences of the FLAG_ variable are removed,