fix(useless_conversion): remove unnecessary blank line in adjustments function

Author: keirsalterego

clippy_lints/src/useless_conversion.rs

@@ -459,7 +459,6 @@ fn adjustments(cx: &LateContext<'_>, expr: &Expr<'_>) -> String {
 
     let adjustments = cx.typeck_results().expr_adjustments(expr);
 
-
     let [.., last] = adjustments else { return prefix };
     let target = last.target;