Remove unused config/localStorage module

src/config/localStorage.js

@@ -1,34 +0,0 @@
-/**
- * @fileoverview Provides functions for storing and retrieving configuration from HTML5 local storage.
- * @module config/localStorage
- */
-
-/**
- * This object is used for storing and retrieving configuration from HTML5 local storage.
- */
-class LocalStorage {
-  /**
-   * Reads the config out of the HTML5 local storage
-   * and initializes the object config.
-   * if config is null the default config will be used
-   */
-  read() {
-    const raw = globalThis.localStorage.getItem("config");
-    const cf = (raw === null ? null : JSON.parse(raw));
-    if (cf === null) {
-      this.config = this.default_config;
-      this.write();
-    } else {
-      this.config = cf;
-    }
-  }
-
-  /**
-   * Writes the config to HTML5 local storage
-   */
-  write() {
-    globalThis.localStorage.setItem("config", JSON.stringify(this.config));
-  }
-}
-
-export default LocalStorage;