Update print.md

There was an extra, i have removed it
`println!("Base 16 (hexadecimal): {:x}", 694240);`

src/hello/print.md

@@ -37,7 +37,6 @@ fn main() {
     println!("Base 2 (binary):       {:b}", 69420); // 10000111100101100
     println!("Base 8 (octal):        {:o}", 69420); // 207454
     println!("Base 16 (hexadecimal): {:x}", 69420); // 10f2c
-    println!("Base 16 (hexadecimal): {:X}", 69420); // 10F2C
 
     // You can right-justify text with a specified width. This will
     // output "    1". (Four white spaces and a "1", for a total width of 5.)