fix

Author: puripuri2100

src/ch03-03-how-functions-work.md

@@ -120,16 +120,6 @@ look like in Rust:
 {{#rustdoc_include ../listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs}}
 ```
 
-```rust
-fn main() {
-    another_function(5);
-}
-
-fn another_function(x: i32) {
-    println!("The value of x is: {}", x);   // xの値は{}です
-}
-```
-
 <!--
 Try running this program; you should get the following output:
 -->

src/ch03-05-control-flow.md

@@ -381,13 +381,6 @@ like this:
 ```rust,ignore
 {{#rustdoc_include ../listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs}}
 ```
-```rust,ignore
-fn main() {
-    loop {
-        println!("again!");   // また
-    }
-}
-```
 
 <!--
 When we run this program, we’ll see `again!` printed over and over continuously