Remove ex_doc from tests

Author: elbrujohalcon

rebar.config

@@ -8,7 +8,7 @@
 {profiles,
  [{test, [{cover_enabled, true}, {cover_opts, [verbose]}, {ct_opts, [{verbose, true}]}]}]}.
 
-{alias, [{test, [compile, lint, xref, dialyzer, ct, cover, ex_doc]}]}.
+{alias, [{test, [compile, lint, xref, dialyzer, ct, cover]}]}.
 
 %% == Dependencies and plugins ==