Remove it to be safe

Author: arora-aman

compiler/rustc_error_codes/src/error_codes/E0504.md

@@ -5,25 +5,6 @@ closure.
 
 Erroneous code example:
 
-```compile_fail
-struct FancyNum {
-    s: String,
-}
-
-fn main() {
-    let fancy_num = FancyNum { s: "".into() };
-    let fancy_ref = &fancy_num;
-
-    let x = move || {
-        println!("child function: {}", fancy_num.s);
-        // error: cannot move `fancy_num` into closure because it is borrowed
-    };
-
-    x();
-    println!("main function: {}", fancy_ref.s);
-}
-```
-
 Here, `fancy_num` is borrowed by `fancy_ref` and so cannot be moved into
 the closure `x`. There is no way to move a value into a closure while it is
 borrowed, as that would invalidate the borrow.