actually remove test, it is not that new.

Author: JoJoDeveloping

tests/pass/tree_borrows/tree-borrows.rs

@@ -10,7 +10,6 @@ fn main() {
     direct_mut_to_const_raw();
     local_addr_of_mut();
     returned_mut_is_usable();
-    raw_children_of_refmut_can_alias();
 
     // Stacked Borrows tests
     read_does_not_invalidate1();
@@ -356,20 +355,3 @@ fn write_does_not_invalidate_all_aliases() {
     other::lib2();
     assert_eq!(*x, 1337); // oops, the value changed! I guess not all pointers were invalidated
 }
-
-fn raw_children_of_refmut_can_alias() {
-    fn test_with_protector(x: &mut u8) {
-        unsafe {
-            let child1 = &raw mut *x;
-            let child2 = &raw mut *x;
-            // We create two raw aliases of `x`: they have the exact same
-            // tag and can be used interchangeably.
-            child1.write(1);
-            child2.write(2);
-            child1.write(1);
-            child2.write(2);
-        }
-    }
-
-    test_with_protector(&mut 42u8);
-}