eliminate WHO arguments from interpreter-private functions * interpreter-private.h, inpterpreter-private.cc (__get_interpreter__, __get_dynamic_loader__, __get_error_system__, __get_gh_manager__, __get_help_system__, __get_input_system__, __get_load_path__, __get_load_save_system__, __get_event_manager__, __get_output_system__, __get_type_info__, __get_symbol_table__, __get_current_scope__, __require_current_scope__, __get_evaluator__, __get_bp_table__, __get_child_list__, __get_cdef_manager__, __get_display_info__, __get_gtk_manager__): Eliminate WHO argument. Previously, it was never displayed by __get_interpreter__. And, as pointed out by Petter Tomner in patch #10216, passing a std::string object could have performance issues. (__get_interpreter__): Eliminate useless call to error. Display message to std::cerr then abort.

--- a/libinterp/octave-value/cdef-package.cc	Tue Jun 21 15:44:03 2022 +0200
+++ b/libinterp/octave-value/cdef-package.cc	Wed Jun 22 12:48:59 2022 -0400
@@ -114,8 +114,7 @@
   {
     std::string symbol_name = get_name () + '.' + nm;
 
-    interpreter& interp
-      = __get_interpreter__ ("cdef_package::cdef_package_rep::find");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.find (symbol_name);
   }
@@ -194,8 +193,7 @@
     //        match the one already referenced by those classes or
     //        sub-packages.
 
-    cdef_manager& cdm
-      = __get_cdef_manager__ ("cdef_package::cdef_package_rep::meta_release");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     // Don't delete the "meta" package.
     if (this != cdm.meta ().get_rep ())