MdeModulePkg: Remove ArmPkg Dependency

With commita21a994f55e53325d3e060c435ca3a87fd7c2c79 MdeModulePkg no
longer has a hard dependency on ArmMmuLib and therefore ArmLib. This is
the final dependency on ArmPkg, so remove the unused libs and drop the
allowed dependency on ArmPkg as MdeModulePkg should not depend on it as
this is a circular dependency.

Github PR: https://github.com/tianocore/edk2/pull/5361
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3651

Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>

Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>
Reviewed-by: Sean Brogan <sean.brogan@microsoft.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdeModulePkg/MdeModulePkg.ci.yaml

@@ -53,8 +53,7 @@
         "AcceptableDependencies": [
             "MdePkg/MdePkg.dec",
             "MdeModulePkg/MdeModulePkg.dec",
-            "StandaloneMmPkg/StandaloneMmPkg.dec",
-            "ArmPkg/ArmPkg.dec"  # this should be fixed by promoting an abstraction
+            "StandaloneMmPkg/StandaloneMmPkg.dec"
         ],
         # For host based unit tests
         "AcceptableDependencies-HOST_APPLICATION":[

MdeModulePkg/MdeModulePkg.dsc

@@ -179,8 +179,6 @@
   MemLib|StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf
 
 [LibraryClasses.ARM, LibraryClasses.AARCH64]
-  ArmLib|ArmPkg/Library/ArmLib/ArmBaseLib.inf
-  ArmMmuLib|ArmPkg/Library/ArmMmuLib/ArmMmuBaseLib.inf
   LockBoxLib|MdeModulePkg/Library/LockBoxNullLib/LockBoxNullLib.inf
 
   #