Deleted more ProjectN leftovers

[FabianNitsche]

While trying to build on RaspberryPi 3 B+ with Ubuntu 20.04 Arm64 I found some issues.

The compiler gave me the following error:

/home/ubuntu/projects/corert/src/Native/Runtime/MiscHelpers.cpp:354:42: error: member access into incomplete type 'Module'
        ASSERT(pModule == NULL || pModule->ContainsDataAddress(pIatCell));
                                         ^
/home/ubuntu/projects/corert/src/Native/Runtime/Portable/../forward_declarations.h:23:10: note: forward declaration of 'Module'
FWD_DECL(Module)
         ^
1 error generated.

It seems to be more leftovers from the ProjectN. And since Module is always null, I was so bolt to just delete the asserts, since they will always succeed.

[jkotas]

Thanks!