StandaloneMmPkg/MemLib: remove unnecessary check #249

Job	Run time
Analyze (ArmPkg, IA32,X64)	3m 38s
Analyze (CryptoPkg, IA32)	13m 9s
Analyze (CryptoPkg, X64)	19m 8s
Analyze (DynamicTablesPkg, IA32,X64)	8m 1s
Analyze (FatPkg, IA32,X64)	10m 17s
Analyze (FmpDevicePkg, IA32,X64)	9m 45s
Analyze (IntelFsp2Pkg, IA32,X64)	12m 0s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	11m 59s
Analyze (MdeModulePkg, IA32)	16m 49s
Analyze (MdeModulePkg, X64)	13m 46s
Analyze (MdePkg, IA32,X64)	15m 54s
Analyze (PcAtChipsetPkg, IA32,X64)	7m 46s
Analyze (PrmPkg, IA32,X64)	9m 34s
Analyze (SecurityPkg, IA32,X64)	11m 26s
Analyze (ShellPkg, IA32,X64)	14m 49s
Analyze (SourceLevelDebugPkg, IA32,X64)	9m 18s
Analyze (StandaloneMmPkg, IA32,X64)	12m 14s
Analyze (UefiCpuPkg, IA32,X64)	14m 42s
Analyze (UnitTestFrameworkPkg, IA32,X64)	12m 9s
	3h 46m 24s

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