Clean up warnings

Makefile

@@ -36,13 +36,13 @@ ifc-test:
 	cd ifc && make test
 
 kifu-core/dev:
-	cd kifu/kifu-core && make test
+	cd kifu/core && make test
 
 kifu-core/test:
-	cd kifu/kifu-core && make test
+	cd kifu/core && make test
 
 kifu-core/test-oneshot:
-	cd kifu/kifu-core && make test-oneshot
+	cd kifu/core && make test-oneshot
 
 kifu-gtk:
 	cd kifu/gtk && make release

kifu/core/src/types.rs

@@ -55,7 +55,7 @@ impl AppState {
     pub fn place_stone(&mut self, req: PlayStoneRequest) {
         match self.game {
             Some(ref mut game) => {
-                game.place_stone(Coordinate {
+                let _ = game.place_stone(Coordinate {
                     column: req.column,
                     row: req.row,
                 });

kifu/gtk/src/ui/playing_field.rs

@@ -5,13 +5,7 @@ use crate::{
 };
 use glib::Object;
 use gtk::{prelude::*, subclass::prelude::*};
-use kifu_core::{
-    ui::{
-        BoardElement, ChatElement, IntersectionElement, PlayerCardElement, PlayingFieldView,
-        StoneElement, TextFieldElement,
-    },
-    Color, CoreApp, Size,
-};
+use kifu_core::ui::PlayingFieldView;
 use std::{cell::RefCell, rc::Rc};
 
 pub struct PlayingFieldPrivate {