Merge branch 'sqlite_rm_rf' into 'master'

Remove remaining sqlite method call

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13535

See merge request !2862

lib/tasks/gitlab/check.rake

@@ -16,7 +16,6 @@ namespace :gitlab do
 
       check_git_config
       check_database_config_exists
-      check_database_is_not_sqlite
       check_migrations_are_up
       check_orphaned_group_members
       check_gitlab_config_exists