TargetLoweringBase: Remove unnecessary watchos exception; NFC

WatchOS isn't report as iOS (as opposed to tvos) so the exception I
added in my last commit wasn't necessary after all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321041 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TargetLoweringBase.cpp

@@ -91,12 +91,13 @@ static cl::opt<unsigned> OptsizeJumpTableDensity(
 
 static bool darwinHasSinCos(const Triple &TT) {
   assert(TT.isOSDarwin() && "should be called with darwin triple");
-  // macos < 10.9 has no sincos_stret and we don't bother for 32bit code.
+  // Macos < 10.9 has no sincos_stret and we don't bother for 32bit code.
   if (TT.isMacOSX())
     return !TT.isMacOSXVersionLT(10, 9) && TT.isArch64Bit();
-  // ios < 7.0 has no sincos_stret (watchos reports version 2.0 but is fine).
+  // iOS < 7.0 has no sincos_stret.
   if (TT.isiOS())
-    return !TT.isOSVersionLT(7, 0) || TT.isWatchOS();
+    return !TT.isOSVersionLT(7, 0);
+  // Any other darwin such as WatchOS/TvOS is new enough.
   return true;
 }