[PhaseOrdering] Remove -enable-matrix flag from sub-xor.ll test.

The test does not use matrix intrinsics, so does not need enable-matrix.

Author: fhahn

llvm/test/Transforms/PhaseOrdering/SystemZ/sub-xor.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -passes='default<O2>' -enable-matrix -S %s | FileCheck %s
+; RUN: opt -passes='default<O2>' -S %s | FileCheck %s
 
 target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-a:8:16-n32:64"
 target triple = "systemz"