REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1783 While cleaning the certdb, always delete the variable data in the certdb regardless of its attribute. Cc: Chao Zhang <chao.b.zhang@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jian Wang <jian.j.wang@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Liming Gao <liming.gao@intel.com> Signed-off-by: Zhichao Gao <zhichao.gao@intel.com> Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>