SecurityPkg: Remove dead code and inf redundant definitions.

SecurityPkg: Remove dead code and inf redundant definitions.

Fix BZ1065, https://bugzilla.tianocore.org/show_bug.cgi?id=1065.
Remove dead code and inf redundant definitions from SecurityPkg.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chen A Chen <chen.a.chen@intel.com>
Cc: Zhang Chao B <chao.b.zhang@intel.com>
Reviewed-by: Zhang Chao B <chao.b.zhang@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>