[Target/ARM] Remove unused 'private' from class.

Differential Revision:	http://reviews.llvm.org/D9611
Reviewed by:	rengolin

llvm-svn: 236918

llvm/lib/Target/ARM/ARMOptimizeBarriersPass.cpp

@@ -30,8 +30,6 @@ public:
   const char *getPassName() const override {
     return "optimise barriers pass";
   }
-
-private:
 };
 char ARMOptimizeBarriersPass::ID = 0;
 }