[ARM] Remove redundant -mtriple=arm from RUN line

Author: valadaptive

llvm/test/Transforms/InstCombine/ARM/tbl1.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -mtriple=arm -passes=instcombine -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
 
 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
 target triple = "armv8-arm-none-eabi"