Revert "Add workaround so rebar2 can use Elixir 1.12.0"

This reverts commit 937e1c2e37.

Makefile.in

@@ -130,7 +130,6 @@ ifeq "$(IS_REBAR)" "3"
   EBINDIR=$(DEPSDIR)/ejabberd/ebin
   REBARREL=$(REBAR) as prod tar
   REBARDEV=REBAR_PROFILE=dev $(REBAR) release
-  ELIXIR_WARNING="\033[32m===>\033[00m If you get \033[1;91mDependency failure: source for elixir...\033[00m, please run \033[4;37mmake\033[00m again"
 else
   SKIPDEPS=skip_deps=true
   LISTDEPS=-q list-deps
@@ -143,23 +142,12 @@ else
   EBINDIR=ebin
   REBARREL=$(REBAR) generate
   REBARDEV=
-  ELIXIR_WARNING="\033[32m===>\033[00m If you get \033[1;91mERROR: Dependency dir .../elixir failed...\033[00m, please run \033[4;37mmake\033[00m again"
 endif
 endif
 
 all: deps src
 
-deps: elixir-rebar $(DEPSDIR)/.got
-
-elixir-rebar:
-	@[ @elixir@ = true ] \
-	 && ( [ ! -d $(DEPSDIR)/elixir/ ] \
-	 && echo $(ELIXIR_WARNING) \
-	      || ( [ ! -f $(DEPSDIR)/elixir/rebar.config ] \
-		   && { mkdir $(DEPSDIR)/elixir/src ; \
-			cp lib/elixir.app.src $(DEPSDIR)/elixir/src/ ; \
-			cp lib/rebar.config $(DEPSDIR)/elixir/ ; } \
-		   || true ) ) || true
+deps: $(DEPSDIR)/.got
 
 $(DEPSDIR)/.got:
 	rm -rf $(DEPSDIR)/.got

lib/elixir.app.src

@@ -1,11 +0,0 @@
-{application, elixir,
-[{description, "elixir"},
- {vsn, "1.12.0"},
- {modules, [
-	elixir
-  ]},
- {registered, [elixir_config, elixir_code_server]},
- {applications, [kernel,stdlib,compiler]},
- {mod, {elixir,[]}},
- {env, [{ansi_enabled, false}]}
-]}.

lib/rebar.config

@@ -1,21 +0,0 @@
-%% Using Elixir as a Rebar dependency
-
-%% This configuration file only exists so Elixir can be used
-%% as a Rebar dependency, the same happens for the file
-%% src/elixir.app.src.
-
-%% In practice, Elixir is structured as OTP where many applications
-%% are placed in the lib directory. Since this structure is not
-%% supported by default by Rebar, after adding Elixir as a dependency
-%% you need to explicitly add it to lib_dirs:
-%%
-%%   {lib_dirs, [
-%%     "deps/elixir/lib"
-%%   ]}.
-%%
-
-%% Run "make" as the proper compilation step
-{post_hooks, [{compile, "make compile"}]}.
-
-%% This prevents rebar_elixir_plugin from recompiling Elixir
-{ex_opts, [{src_dirs, [".PHONY"]}]}.

rebar.config

@@ -24,7 +24,7 @@
         {if_var_true, tools,
          {ejabberd_po, ".*", {git, "https://github.com/processone/ejabberd-po", {branch, "main"}}}},
         {if_var_true, elixir,
-         {elixir, ".*", {git, "https://github.com/elixir-lang/elixir", {tag, "v1.12.0"}}}},
+         {elixir, ".*", {git, "https://github.com/elixir-lang/elixir", {tag, "v1.4.4"}}}},
         {if_var_true, pam,
          {epam, ".*", {git, "https://github.com/processone/epam", {tag, "1.0.12"}}}},
         {if_var_true, redis,