Make pre-loaded modules permanently sticky

Modules in the kernel, stdlib, and compiler applications are by
default "sticky", meaning that the code server will refuse to
re-load them.

The pre-loaded modules (those that are part of the run-time system
itself, such as 'erlang') are, however, not sticky. They used to be
sticky a long time ago when the pre-loaded modules were part of
the kernel application. Now they are part of the erts application.

Since re-loading a pre-loaded module can be catastrophic (especially
re-loading the 'erlang' module), the pre-loaded modules must be
sticky. Furthermore, it should not be allowed to unstick them.

The sticky_dir/1 test case in code_SUITE is never actually run and
is broken. Rewrite it.

1 files changed, 0 insertions, 23 deletions

diff --git a/lib/kernel/test/code_SUITE_data/calendar.erl b/lib/kernel/test/code_SUITE_data/calendar.erl
deleted file mode 100644
index c1a4a1c12a..0000000000
--- a/lib/kernel/test/code_SUITE_data/calendar.erl
+++ /dev/null
@@ -1,23 +0,0 @@
-%%
-%% %CopyrightBegin%
-%% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
-%% 
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%% 
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
-%% 
-%% %CopyrightEnd%
-%%
--module(calendar).
--export([test/1]).
-
-test(apa) ->
-    {error, this_function_should_not_be_called}.