Eliminate the cfg namespace, moving LoopInfo, Dominators, Interval* classes

to the global namespace


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2370 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/PromoteMemoryToRegister.cpp

@@ -29,9 +29,6 @@
 
 using namespace std;
 
-
-using cfg::DominanceFrontier;
-
 namespace {
 
 //instance of the promoter -- to keep all the local function data.