DefaultCharset is not used anywhere.

setup/lib/config_info.inc.php

@@ -41,7 +41,6 @@ $cfg_db['Servers'] = array(1 => array(
         'order'    => array('', 'deny,allow', 'allow,deny', 'explicit')),
     'only_db'      => 'array'));
 $cfg_db['RecodingEngine'] = array('auto', 'iconv', 'recode');
-$cfg_db['DefaultCharset'] = $GLOBALS['cfg']['AvailableCharsets'];
 $cfg_db['OBGzip'] = array('auto', true, false);
 $cfg_db['ShowTooltipAliasTB'] = array('nested', true, false);
 $cfg_db['DisplayDatabasesList'] = array('auto', true, false);

setup/lib/forms.inc.php

@@ -75,7 +75,6 @@ $forms['Import_export'] = array(
     'UploadDir',
     'SaveDir',
     'AllowAnywhereRecoding',
-    'DefaultCharset',
     'RecodingEngine',
     'IconvExtraParams',
     'ZipDump',

setup/lib/messages.inc.php

@@ -45,8 +45,6 @@ $strSetupCompressOnFly_name = __('Compress on the fly');
 $strSetupConfigurationFile = __('Configuration file');
 $strSetupConfirm_desc = __('Whether a warning ("Are your really sure...") should be displayed when you\'re about to lose data');
 $strSetupConfirm_name = __('Confirm DROP queries');
-$strSetupDefaultCharset_desc = __('Default character set used for conversions');
-$strSetupDefaultCharset_name = __('Default character set');
 $strSetupDefaultLanguage = __('Default language');
 $strSetupDefaultServer = __('Default server');
 $strSetupDefaultTabDatabase_desc = __('Tab that is displayed when entering a database');