Revert "Ship promises and weak collections"

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index ba5b15417dd9648e2cbef3fd9c56aa4b4beb825e..2d2cadf4435fa939a06672fe342b5f13c9038093 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -175,9 +175,12 @@ DEFINE_bool(harmony_modules, false,
             "enable harmony modules (implies block scoping)")
 DEFINE_bool(harmony_symbols, false,
             "enable harmony symbols (a.k.a. private names)")
+DEFINE_bool(harmony_promises, false, "enable harmony promises")
 DEFINE_bool(harmony_proxies, false, "enable harmony proxies")
 DEFINE_bool(harmony_collections, false,
-            "enable harmony collections (sets, maps)")
+            "enable harmony collections (sets, maps, weak sets, weak maps)")
+DEFINE_bool(harmony_weak_collections, false,
+            "enable only harmony weak collections (weak sets and maps)")
 DEFINE_bool(harmony_generators, false, "enable harmony generators")
 DEFINE_bool(harmony_iteration, false, "enable harmony iteration (for-of)")
 DEFINE_bool(harmony_numeric_literals, false,
@@ -197,10 +200,14 @@ DEFINE_implication(harmony, harmony_iteration)
 DEFINE_implication(harmony, harmony_numeric_literals)
 DEFINE_implication(harmony, harmony_strings)
 DEFINE_implication(harmony, harmony_arrays)
+DEFINE_implication(harmony_collections, harmony_weak_collections)
+DEFINE_implication(harmony_promises, harmony_weak_collections)
 DEFINE_implication(harmony_modules, harmony_scoping)
 
 DEFINE_implication(harmony, es_staging)
 DEFINE_implication(es_staging, harmony_maths)
+DEFINE_implication(es_staging, harmony_promises)
+DEFINE_implication(es_staging, harmony_weak_collections)
 
 // Flags for experimental implementation features.
 DEFINE_bool(packed_arrays, true, "optimizes arrays that have no holes")