To remove unwanted items from the WordPress Dashboard that are part of the menu you can add the following code to the functions.php of your theme.

function img_remove_menus () {
 global $menu; // Make the menu variable global in scope
 $restricted = array( __('Posts'), __('Links'),__('Comments'), __('Tools'));
 end ($menu); // get final array value
 while (prev($menu)){ //check for previous value
 $value = explode(' ',$menu[key($menu)][0]);
 if(in_array($value[0] != NULL?$value[0]:"" , $restricted)){
 unset($menu[key($menu)]); //
 }
 }
 }

add_action('admin_menu', 'img_remove_menus'); // add the action for removing the unwanted menu items