StandaloneMmPkg: Delete StandaloneMmPkg file.
StandaloneMmPkg: Delete StandaloneMmPkg file.

This patch deletes "StandaloneMmPkg" which was created as a file
intially. This patch enables creation of "StandaloneMmPkg" as a folder.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Supreeth Venkatesh <e636ad8a3c68a860c3594da0efc73a6a46c31f2f@arm.com>
Reviewed-by: Achin Gupta <41a3159f04979f8ab0f18b7cd5cc8189d01ec1bb@arm.com>
Reviewed-by: Jiewen Yao <1b630bbf68c0ea110d75f22c1f8a37a44b6a79b4@intel.com>
Signed-off-by: Sughosh Ganu <89c5e32bab4ac30865936b46fb918f58cd11fd98@arm.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2