Remove distraction about literal 100

Author: carols10cents

src/ch09-01-unrecoverable-errors-with-panic.md

@@ -60,11 +60,7 @@ fn main() {
 We attempt to access the hundredth element of our vector, but it only has three
 elements. In this situation, Rust will panic. Using `[]` is supposed to return
 an element. If you pass `[]` an invalid index, though, there's no element that
-Rust could return here that would be correct. In this case, we've typed in a
-literal index of `100`, so in theory, Rust could examine our code at compile
-time and raise an error at that point. But if our program was different, say,
-maybe reading the index from user input, it would not be possible to determine
-at compile time if the index was in bounds.
+Rust could return here that would be correct.
 
 Other languages like C will attempt to give you exactly what you asked for in
 this situation, even though it isn't what you want: you'll get whatever is at