ARM: drop check for triple that's no longer used.

Early attempts to support AAPCS bare metal MachO targets based the decision on
the CPU being compiled for. This was not a particularly great idea and we've
got a better option now, but this check remained.

No functional change for any target we care about.

llvm-svn: 219767

llvm/lib/Target/ARM/ARMSubtarget.cpp

@@ -255,9 +255,8 @@ void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
       TargetABI = ARM_ABI_AAPCS;
       break;
     default:
-      if ((isTargetIOS() && isMClass()) ||
-          (TargetTriple.isOSBinFormatMachO() &&
-           TargetTriple.getOS() == Triple::UnknownOS))
+      if (TargetTriple.isOSBinFormatMachO() &&
+          TargetTriple.getOS() == Triple::UnknownOS)
         TargetABI = ARM_ABI_AAPCS;
       else
         TargetABI = ARM_ABI_APCS;