rpn(1): code cleanup

src/rpn.rs

@@ -50,17 +50,7 @@ use std::{
 	process::ExitCode,
 };
 
-use CalcType::{
-	Add,
-	Divide,
-	Empty,
-	Floor,
-	Modulo,
-	Multiply,
-	Power,
-	Subtract,
-	Val
-};
+use CalcType::*;
 
 extern crate sysexits;