don't include certifi priv dir in escript, it is not needed

rebar.config

@@ -15,7 +15,6 @@
 %% escript_incl_extra is for internal rebar-private use only.
 %% Do not use outside rebar. Config interface is not stable.
 {escript_incl_extra, [{"relx/priv/templates/*", "_build/default/lib/"},
-                      {"certifi/priv/*", "_build/default/lib/"},
                       {"rebar/priv/templates/*", "_build/default/lib/"}]}.
 
 {erl_opts, [{platform_define, "^[0-9]+", namespaced_types},