MdeModulePkg: Remove RecoveryLib.h and PeiRecoveryLibNull
RecoveryLib.h and PeiRecoveryLibNull have been deprecated from 2009,
so remove them.
https://bugzilla.tianocore.org/show_bug.cgi?id=1299
Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Star Zeng <star.zeng@intel.com> Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>