Part of meta-issue #2002650: [meta] improve maintainability by removing unused local variables
File /core/includes/bootstrap.inc
Line 592: Unused local variable $databases
Line 592: Unused local variable $db_prefix
Line 592: Unused local variable $drupal_hash_salt
Line 592: Unused local variable $config_directories
Line 1543: Unused local variable $base_root
Line 2308: Unused local variable $conf
Line 3027: Unused local variable $key