disable maps on R14, R15 and R16

config/maps

@@ -1 +0,0 @@
-maps:keys(#{0 => false, 1 => true}) == [0,1].

rebar.config

@@ -1,6 +1,4 @@
-% uncomment to disable encoding support for erlang maps
-% {jsx_nomaps, true}.
-
 {erl_opts, [
-  {platform_define, "R14|R15", 'no_binary_to_whatever'}
+  {platform_define, "R14|R15", 'no_binary_to_whatever'},
+  {platform_define, "^((?!R1[456]).)*$", 'maps_support'}
 ]}.

rebar.config.script

@@ -1,9 +0,0 @@
-case os:getenv("JSX_NOMAPS") or proplists:get_value(jsx_nomaps, CONFIG, false) of
-  false ->
-    try file:script("config/maps") of
-      {ok, true} -> [{erl_opts, [{d, maps_support}]}] ++ CONFIG;
-      _ -> CONFIG
-    catch _:_ -> CONFIG
-    end;
-  _ -> CONFIG
-end.