Refactor SlidingTextBox: encapsulate initialize function and remove unused updateHeight function

Author: jsakamoto

src/components/SlidingTextBox.tsx

@@ -1,7 +1,7 @@
 import { useEffect, useRef } from "react";
 import styles from "./SlidingTextBox.module.css";
 
-export const initialize = (containerBox: HTMLElement) => {
+const initialize = (containerBox: HTMLElement) => {
   const resizeObserver = new ResizeObserver((_) => {
     containerBox.style.minHeight = contentBox?.scrollHeight + "px";
   });
@@ -17,11 +17,6 @@ export const initialize = (containerBox: HTMLElement) => {
   };
 };
 
-export const updateHeight = (containerBox: HTMLElement) => {
-  const contentBox = containerBox.querySelector<HTMLElement>("." + styles.contentBox);
-  containerBox.style.minHeight = contentBox?.scrollHeight + "px";
-};
-
 export const SlidingTextBox = ({ text }: { text: string }) => {
   const containerBoxRef = useRef<HTMLDivElement>(null);
   const initialRendering = useRef(true);