address comments

Author: AlexMaclean

llvm/test/CodeGen/NVPTX/add-rotate.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc < %s -march=nvptx64 -mcpu=sm_50 | FileCheck %s
+; RUN: llc < %s -mcpu=sm_50 | FileCheck %s
 
 target triple = "nvptx64-nvidia-cuda"