[core] Remove last remaining parts of profiling code which was removed in 2006.

libraries/config/setup.forms.php

@@ -118,8 +118,7 @@ $forms['Features']['Developer'] = array(
     'UserprefsDeveloperTab',
     'Error_Handler/display',
     'Error_Handler/gather',
-    'DBG/sql',
-    'DBG/php');
+    'DBG/sql');
 $forms['Features']['Other_core_settings'] = array(
     'NaturalOrder',
     'InitialSlidersState',
@@ -370,4 +369,4 @@ $forms['Export']['Texy'] = array('Export' => array(
     ':group:' . __('Data'),
         'texytext_null',
         'texytext_columns'));
-?>
+?>