Revert "Add -mcpu=z10 to SystemZ tests."

This reverts commit r197466.

The MachineCSE fix that required the -mcpu flag has been disabled
until more work can be done to fix downstream issues. Adding -mcpu
wasn't the right workaround anyway.

llvm-svn: 197624
diff --git a/llvm/test/CodeGen/SystemZ/int-div-01.ll b/llvm/test/CodeGen/SystemZ/int-div-01.ll
index cc107e4..2c21186 100644
--- a/llvm/test/CodeGen/SystemZ/int-div-01.ll
+++ b/llvm/test/CodeGen/SystemZ/int-div-01.ll
@@ -1,6 +1,6 @@
 ; Test 32-bit signed division and remainder.
 ;
-; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
 
 declare i32 @foo()