Revert "[MSP430] Add MC layer"

This commit broke the module buildbots.
Error:

lib/Target/MSP430/MSP430GenAsmMatcher.inc:1027:1: error: redundant
namespace 'llvm' [-Wmodules-import-nested-redundant]
^

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@346410 91177308-0d34-0410-b5e6-96231b3b80d8
73 files changed