[PowerPC][NFC] Remove comments mentioning Darwin and VRSAVE from lit test.

Author: mandlebug

llvm/test/CodeGen/PowerPC/sjlj.ll

@@ -59,11 +59,10 @@ return:                                           ; preds = %if.end, %if.then
   %3 = load i32, i32* %retval
   ret i32 %3
 
-; FIXME: We should be saving VRSAVE on Darwin, but we're not!
 
 ; CHECK-LABEL: main:
 ; CHECK: std
-; Make sure that we're not saving VRSAVE on non-Darwin:
+; Make sure that we're not saving VRSAVE:
 ; CHECK-NOT: mfspr
 
 ; CHECK-DAG: stfd