[ValueTracing] Drop TODO. NFC.

Author: dtcxzyw

llvm/test/Transforms/InstSimplify/known-non-zero-opaque-ptrs.ll

@@ -4,7 +4,6 @@
 declare void @zero_args()
 declare void @two_args(ptr, ptr)
 
-; TODO: Could be non-null based on call-site attributes.
 define i1 @test_zero_args_nonnull(ptr %p) {
 ; CHECK-LABEL: @test_zero_args_nonnull(
 ; CHECK-NEXT:    call void @zero_args(ptr noundef nonnull [[P:%.*]])
@@ -26,7 +25,6 @@ define i1 @test_zero_args_maybe_null(ptr %p) {
   ret i1 %c
 }
 
-; TODO: Could be non-null based on call-site attributes.
 define i1 @test_two_args_nonnull(ptr %p) {
 ; CHECK-LABEL: @test_two_args_nonnull(
 ; CHECK-NEXT:    call void @two_args(ptr noundef nonnull [[P:%.*]])