No longer support OTP 19 beam files in Dialyzer

This commit removes the old code branches that attempted
to translate Erlang Abstract Format to Core and relies
exclusively on the new debug_info chunk.

This is a follow up to #1367.

Author: José Valim

lib/dialyzer/src/dialyzer_utils.erl

@@ -120,92 +120,10 @@ get_core_from_beam(File, Opts) ->
 	  {error, "  Could not get Core Erlang code for: " ++ File ++ "\n"}
       end;
     _ ->
-      deprecated_get_core_from_beam(File, Opts)
+      {error, "  Could not get Core Erlang code for: " ++ File ++ "\n" ++
+        "  Recompile with +debug_info or analyze starting from source code"}
   end.
 
-deprecated_get_core_from_beam(File, Opts) ->
-  case get_abstract_code_from_beam(File) of
-    error ->
-      {error, "  Could not get abstract code for: " ++ File ++ "\n" ++
-       "  Recompile with +debug_info or analyze starting from source code"};
-    {ok, AbstrCode} ->
-      case get_compile_options_from_beam(File) of
-        error ->
-          {error, "  Could not get compile options for: " ++ File ++ "\n" ++
-            "  Recompile or analyze starting from source code"};
-        {ok, CompOpts} ->
-          case get_core_from_abstract_code(AbstrCode, Opts ++ CompOpts) of
-            error ->
-              {error, "  Could not get core Erlang code for: " ++ File};
-            {ok, _} = Core ->
-              Core
-          end
-      end
-  end.
-
-get_abstract_code_from_beam(File) ->
-  case beam_lib:chunks(File, [abstract_code]) of
-    {ok, {_, List}} ->
-      case lists:keyfind(abstract_code, 1, List) of
-        {abstract_code, {raw_abstract_v1, Abstr}} -> {ok, Abstr};
-        _ -> error
-      end;
-    _ ->
-      %% No or unsuitable abstract code.
-      error
-  end.
-
-get_compile_options_from_beam(File) ->
-  case beam_lib:chunks(File, [compile_info]) of
-    {ok, {_, List}} ->
-      case lists:keyfind(compile_info, 1, List) of
-        {compile_info, CompInfo} -> compile_info_to_options(CompInfo);
-        _ -> error
-      end;
-    _ ->
-      %% No or unsuitable compile info.
-      error
-  end.
-
-compile_info_to_options(CompInfo) ->
-  case lists:keyfind(options, 1, CompInfo) of
-    {options, CompOpts} -> {ok, CompOpts};
-    _ -> error
-  end.
-
-get_core_from_abstract_code(AbstrCode, Opts) ->
-  %% We do not want the parse_transforms around since we already
-  %% performed them. In some cases we end up in trouble when
-  %% performing them again.
-  AbstrCode1 = cleanup_parse_transforms(AbstrCode),
-  %% Remove parse_transforms (and other options) from compile options.
-  Opts2 = cleanup_compile_options(Opts),
-  try compile:noenv_forms(AbstrCode1, Opts2 ++ src_compiler_opts()) of
-    {ok, _, Core} -> {ok, Core};
-    _What -> error
-  catch
-    error:_ -> error
-  end.
-
-cleanup_parse_transforms([{attribute, _, compile, {parse_transform, _}}|Left]) ->
-  cleanup_parse_transforms(Left);
-cleanup_parse_transforms([Other|Left]) ->
-  [Other|cleanup_parse_transforms(Left)];
-cleanup_parse_transforms([]) ->
-  [].
-
-cleanup_compile_options(Opts) ->
-  lists:filter(fun keep_compile_option/1, Opts).
-
-%% Using abstract, not asm or core.
-keep_compile_option(from_asm) -> false;
-keep_compile_option(from_core) -> false;
-%% The parse transform will already have been applied, may cause
-%% problems if it is re-applied.
-keep_compile_option({parse_transform, _}) -> false;
-keep_compile_option(warnings_as_errors) -> false;
-keep_compile_option(_) -> true.
-
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 %%  Typed Records