rabbit_env: Drop $RABBITMQ_LOG_FF_REGISTRY

[Why]
Its use was removed when the registry was converted from a compiled
module to a persistent_term.

Author: dumbbell

deps/rabbit_common/src/rabbit_env.erl

@@ -65,7 +65,6 @@
          "RABBITMQ_KEEP_PID_FILE_ON_EXIT",
          "RABBITMQ_LOG",
          "RABBITMQ_LOG_BASE",
-         "RABBITMQ_LOG_FF_REGISTRY",
          "RABBITMQ_LOGS",
          "RABBITMQ_MNESIA_BASE",
          "RABBITMQ_MNESIA_DIR",
@@ -150,7 +149,6 @@ get_context_after_reloading_env(Context) ->
              fun keep_pid_file_on_exit/1,
              fun feature_flags_file/1,
              fun forced_feature_flags_on_init/1,
-             fun log_feature_flags_registry/1,
              fun plugins_path/1,
              fun plugins_expand_dir/1,
              fun enabled_plugins_file/1,
@@ -1010,17 +1008,6 @@ forced_feature_flags_on_init(Context) ->
               forced_feature_flags_on_init, FeatureNames, environment)
     end.
 
-log_feature_flags_registry(Context) ->
-    case get_prefixed_env_var("RABBITMQ_LOG_FF_REGISTRY") of
-        false ->
-            update_context(Context,
-                           log_feature_flags_registry, false, default);
-        Value ->
-            Log = value_is_yes(Value),
-            update_context(Context,
-                           log_feature_flags_registry, Log, environment)
-    end.
-
 %% -------------------------------------------------------------------
 %%
 %% RABBITMQ_PLUGINS_DIR

deps/rabbit_common/test/rabbit_env_SUITE.erl

@@ -187,7 +187,6 @@ check_default_values(_) ->
       interactive_shell => default,
       keep_pid_file_on_exit => default,
       log_base_dir => default,
-      log_feature_flags_registry => default,
       log_levels => default,
       main_config_file => default,
       main_log_file => default,
@@ -231,7 +230,6 @@ check_default_values(_) ->
          interactive_shell => false,
          keep_pid_file_on_exit => false,
          log_base_dir => "/var/log/rabbitmq",
-         log_feature_flags_registry => false,
          log_levels => undefined,
          main_config_file => "/etc/rabbitmq/rabbitmq",
          main_log_file => "/var/log/rabbitmq/" ++ NodeS ++ ".log",
@@ -282,7 +280,6 @@ check_default_values(_) ->
          interactive_shell => false,
          keep_pid_file_on_exit => false,
          log_base_dir => "%APPDATA%/RabbitMQ/log",
-         log_feature_flags_registry => false,
          log_levels => undefined,
          main_config_file => "%APPDATA%/RabbitMQ/rabbitmq",
          main_log_file => "%APPDATA%/RabbitMQ/log/" ++ NodeS ++ ".log",
@@ -408,7 +405,6 @@ check_values_from_reachable_remote_node(Config) ->
           interactive_shell => default,
           keep_pid_file_on_exit => default,
           log_base_dir => default,
-          log_feature_flags_registry => default,
           log_levels => default,
           main_config_file => default,
           main_log_file => default,
@@ -452,7 +448,6 @@ check_values_from_reachable_remote_node(Config) ->
              interactive_shell => false,
              keep_pid_file_on_exit => false,
              log_base_dir => "/var/log/rabbitmq",
-             log_feature_flags_registry => false,
              log_levels => undefined,
              main_config_file => "/etc/rabbitmq/rabbitmq",
              main_log_file => "/var/log/rabbitmq/" ++ NodeS ++ ".log",
@@ -540,7 +535,6 @@ check_values_from_offline_remote_node(_) ->
       interactive_shell => default,
       keep_pid_file_on_exit => default,
       log_base_dir => default,
-      log_feature_flags_registry => default,
       log_levels => default,
       main_config_file => default,
       main_log_file => default,
@@ -584,7 +578,6 @@ check_values_from_offline_remote_node(_) ->
          interactive_shell => false,
          keep_pid_file_on_exit => false,
          log_base_dir => "/var/log/rabbitmq",
-         log_feature_flags_registry => false,
          log_levels => undefined,
          main_config_file => "/etc/rabbitmq/rabbitmq",
          main_log_file => "/var/log/rabbitmq/" ++ NodeS ++ ".log",