SecurityPkg/DxeDeferImageLoadLib: Remove DxeDeferImageLoadLib

SecurityPkg/DxeDeferImageLoadLib: Remove DxeDeferImageLoadLib

The library DxeDeferImageLoadLib supports UID feature and it is conflicted
with the driver SecurityStubDxe (Defer3rdPartyImageLoad.c).
And the UID feature is dropped. So it should be removed from SecurityPkg.
https://bugzilla.tianocore.org/show_bug.cgi?id=1919

Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian Wang <jian.j.wang@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>