#include <climits> instead of <limits.h> in C++ header file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183957 91177308-0d34-0410-b5e6-96231b3b80d8
Remove forward declaration of MachineBasicBlock. It is #included anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183958 91177308-0d34-0410-b5e6-96231b3b80d8