diff --git a/apps/emqx_authz/src/emqx_authz.erl b/apps/emqx_authz/src/emqx_authz.erl
index b270176ec..23f8fde58 100644
--- a/apps/emqx_authz/src/emqx_authz.erl
+++ b/apps/emqx_authz/src/emqx_authz.erl
@@ -39,8 +39,6 @@
 
 -export([acl_conf_file/0]).
 
--export([ph_to_re/1]).
-
 -type(source() :: map()).
 
 -type(match_result() :: {matched, allow} | {matched, deny} | nomatch).
@@ -371,6 +369,3 @@ type(Unknown) -> error({unknown_authz_source_type, Unknown}).
 %% @doc where the acl.conf file is stored.
 acl_conf_file() ->
     filename:join([emqx:data_dir(), "authz", "acl.conf"]).
-
-ph_to_re(VarPH) ->
-    re:replace(VarPH, "[\\$\\{\\}]", "\\\\&", [global, {return, list}]).
diff --git a/apps/emqx_authz/src/emqx_authz_api_sources.erl b/apps/emqx_authz/src/emqx_authz_api_sources.erl
index 5a0dfac1c..4c0ae5fe5 100644
--- a/apps/emqx_authz/src/emqx_authz_api_sources.erl
+++ b/apps/emqx_authz/src/emqx_authz_api_sources.erl
@@ -27,27 +27,6 @@
 -define(BAD_REQUEST, 'BAD_REQUEST').
 -define(NOT_FOUND, 'NOT_FOUND').
 
--define(EXAMPLE_REDIS,
-        #{type=> redis,
-          enable => true,
-          server => <<"127.0.0.1:3306">>,
-          redis_type => single,
-          pool_size => 1,
-          auto_reconnect => true,
-          cmd => <<"HGETALL mqtt_authz">>}).
--define(EXAMPLE_FILE,
-        #{type=> file,
-          enable => true,
-          rules => <<"{allow,{username,\"^dashboard?\"},subscribe,[\"$SYS/#\"]}.\n",
-                     "{allow,{ipaddr,\"127.0.0.1\"},all,[\"$SYS/#\",\"#\"]}.">>
-                   }).
-
--define(EXAMPLE_RETURNED,
-        #{sources => [ ?EXAMPLE_REDIS
-                     , ?EXAMPLE_FILE
-                     ]
-        }).
-
 -define(IS_TRUE(Val), ((Val =:= true) or (Val =:= <<"true">>))).
 
 -define(API_SCHEMA_MODULE, emqx_authz_api_schema).
diff --git a/apps/emqx_management/src/emqx_mgmt_api_plugins.erl b/apps/emqx_management/src/emqx_mgmt_api_plugins.erl
index 468d7c931..eb8999cb1 100644
--- a/apps/emqx_management/src/emqx_mgmt_api_plugins.erl
+++ b/apps/emqx_management/src/emqx_mgmt_api_plugins.erl
@@ -147,7 +147,7 @@ fields(plugin) ->
                 required => true,
                 example => "emqx_plugin_template-5.0-rc.1"})
         },
-        {author, hoconsc:mk(list(string()), #{example => [<<"EMQ X Team">>]})},
+        {author, hoconsc:mk(list(string()), #{example => [<<"EMQX Team">>]})},
         {builder, hoconsc:ref(?MODULE, builder)},
         {built_on_otp_release, hoconsc:mk(string(), #{example => "24"})},
         {compatibility, hoconsc:mk(map(), #{example => #{<<"emqx">> => <<"~>5.0">>}})},
@@ -195,7 +195,7 @@ fields(name) ->
 fields(builder) ->
     [
         {contact, hoconsc:mk(string(), #{example => "emqx-support@emqx.io"})},
-        {name, hoconsc:mk(string(), #{example => "EMQ X Team"})},
+        {name, hoconsc:mk(string(), #{example => "EMQX Team"})},
         {website, hoconsc:mk(string(), #{example => "www.emqx.com"})}
     ];
 fields(position) ->