✅ fix up tests

src/main.rs

@@ -371,34 +371,6 @@ fn main () -> Result <()> {
 
 #[cfg (test)]
 mod test {
-	use super::{
-		Io,
-		GameError,
-		Result,
-		State,
-	};
-	
-	struct TestIo {
-		inputs: Vec <String>,
-		input_idx: usize,
-	}
-	
-	impl Io for TestIo {
-		fn print (&mut self, _s: &str) {}
-		
-		fn read_input (&mut self) -> Result <String> {
-			if self.input_idx >= self.inputs.len () {
-				return Err (GameError::IoError);
-			}
-			
-			let s = self.inputs [self.input_idx].clone ();
-			self.input_idx += 1;
-			Ok (s)
-		}
-		
-		fn sleep (&mut self, _milliseconds: u32) {}
-	}
-	
 	#[test]
 	fn parse_input () {
 		use super::{