remove functions deprecated in version 6 * runtests.m: Delete. * scripts/deprecated/module.mk: Update. * error.h, error.cc (error_state, reset_error_handler): Delete. * errwarn.h (warn_divide_by_zero): Delete. * file-io.cc (mark_for_deletion, cleanup_tmp_files): Delete from global namespace. * interpreter.cc, toplev.cc: Don't include file-io.h. * graphics-toolkit.h (graphics_toolkit, base_graphics_toolkit): Delete from global namespace. * input.h, input.cc (Vtrack_line_num): Delete. * interpreter.h, interpreter.cc (interpreter::add_atexit_function, interpreter::remove_atexit_function, interpreter::add_atexit_function_deprecated, interpreter::remove_atexit_function_deprecated): Delete. * symtab.h, symtab.cc (symbol_table::at_top_level_deprecated, symbol_table::varval_deprecated, symbol_table::global_varval_deprecated, symbol_table::top_level_varval_deprecated, symbol_table::global_variable_names_deprecated, symbol_table::top_level_variable_names_deprecated, symbol_table::variable_names_deprecated, symbol_table::assign_deprecated, symbol_table::clear_all_deprecated, symbol_table::clear_global_deprecated, symbol_table::clear_global_pattern_deprecated, symbol_table::clear_symbol_deprecated, symbol_table::clear_symbol_pattern_deprecated, symbol_table::global_assign_deprecated, symbol_table::top_level_assign_deprecated, symbol_table::at_top_level, symbol_table::varval, symbol_table::global_varval, symbol_table::top_level_varval, symbol_table::global_variable_names, symbol_table::top_level_variable_names, symbol_table::variable_names, symbol_table::assign, symbol_table::clear_all, symbol_table::clear_global, symbol_table::clear_global_pattern, symbol_table::clear_symbol, symbol_table::clear_symbol_pattern, symbol_table::global_assign, symbol_table::top_level_assign): Delete. * variables.h, variables.cc (extract_function): Delete. * ov-fcn-handle.h, ov-fcn-handle.cc (make_fcn_handle): Delete. * lo-array-errwarn.h, lo-array-errwarn.cc (err_index_out_of_range): Delete. * quit.h, quit.cc (octave_exception_state, internal_exception_state, octave_bad_alloc_hook, enum octave_internal_exception, octave_throw_interrupt_exception, octave_throw_execution_exception, octave_throw_bad_alloc, octave_rethrow_exception): Delete.

--- a/libinterp/corefcn/variables.cc	Wed Nov 24 07:38:29 2021 -0500
+++ b/libinterp/corefcn/variables.cc	Wed Nov 24 10:26:19 2021 -0500
@@ -1525,45 +1525,3 @@
 }
 
 OCTAVE_NAMESPACE_END
-
-// DEPRECATED in Octave 6
-
-octave_function *
-extract_function (const octave_value& arg, const std::string& warn_for,
-                  const std::string& fname, const std::string& header,
-                  const std::string& trailer)
-{
-  octave_function *retval = is_valid_function (arg, warn_for, 0);
-
-  if (! retval)
-    {
-      std::string s = arg.xstring_value ("%s: argument must be a string",
-                                         warn_for.c_str ());
-
-      std::string cmd = header;
-      cmd.append (s);
-      cmd.append (trailer);
-
-      int parse_status;
-
-      octave::interpreter& interp
-        = octave::__get_interpreter__ ("extract_function");
-
-      interp.eval_string (cmd, true, parse_status, 0);
-
-      if (parse_status != 0)
-        error ("%s: '%s' is not valid as a function",
-               warn_for.c_str (), fname.c_str ());
-
-      retval = is_valid_function (fname, warn_for, 0);
-
-      if (! retval)
-        error ("%s: '%s' is not valid as a function",
-               warn_for.c_str (), fname.c_str ());
-
-      warning ("%s: passing function body as a string is obsolete; please use anonymous functions",
-               warn_for.c_str ());
-    }
-
-  return retval;
-}