[#1003][3.0] Window > ESC 기능 버그 수정

################
- 간헐적으로 removeEventListener가 되지 않아 keydown 이벤트리스너가 중복 등록되는 문제 발생하여 관련 코드 제거

src/components/window/uses.js

@@ -618,10 +618,7 @@ const activeWindows = (() => {
       return windows.length <= 0;
     },
     isFirstWindowOpen() {
-      return windows.length === 1;
-    },
-    isLastWindowClose() {
-      return windows.length === 0;
+      return sequence === 1;
     },
   };
 })();
@@ -682,28 +679,17 @@ const useEscKeydownEvent = ({ closeWin, windowRef }) => {
     topActiveWindow.closeWin();
   };
 
-  const addKeydownEvtHandler = () => {
-    if (activeWindows.isFirstWindowOpen()) {
-      document.addEventListener('keydown', keydownEsc);
-    }
-  };
-
-  const removeKeydownEvtHandler = () => {
-    if (activeWindows.isLastWindowClose()) {
-      document.removeEventListener('keydown', keydownEsc);
-    }
-  };
-
   const setWindowActive = () => {
     isActiveStatus = true;
     addActiveWindow();
-    addKeydownEvtHandler();
+    if (activeWindows.isFirstWindowOpen()) {
+      document.addEventListener('keydown', keydownEsc);
+    }
   };
 
   const setWindowInactive = () => {
     const inactiveWindow = activeWindows.getWindowBySequence(sequence);
     removeInactiveWindow(inactiveWindow);
-    removeKeydownEvtHandler();
     isActiveStatus = false;
   };