Revert of [regexp] ship unicode regexps.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 8123a9996b0a85ac136274469a7a57f6a1eb8fe8..6766d39c9fc72929db19744e9bf7731d63a6b013 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -219,7 +219,8 @@
 // Features that are complete (but still behind --harmony/es-staging flag).
 #define HARMONY_STAGED(V)                                   \
   V(harmony_regexp_lookbehind, "harmony regexp lookbehind") \
-  V(harmony_species, "harmony Symbol.species")
+  V(harmony_species, "harmony Symbol.species")              \
+  V(harmony_unicode_regexps, "harmony unicode regexps")
 
 // Features that are shipping (turned on by default, but internal flag remains).
 #define HARMONY_SHIPPING(V)                                               \
@@ -229,7 +230,6 @@
   V(harmony_object_observe, "harmony Object.observe")                     \
   V(harmony_tostring, "harmony toString")                                 \
   V(harmony_regexps, "harmony regular expression extensions")             \
-  V(harmony_unicode_regexps, "harmony unicode regexps")                   \
   V(harmony_sloppy, "harmony features in sloppy mode")                    \
   V(harmony_sloppy_let, "harmony let in sloppy mode")                     \
   V(harmony_sloppy_function, "harmony sloppy function block scoping")     \