diff --git a/src/utils/AddClass.ts b/src/utils/AddClass.ts
deleted file mode 100644
index c22882a..0000000
--- a/src/utils/AddClass.ts
+++ /dev/null
@@ -1,71 +0,0 @@
-export type Elements = HTMLElement | NodeListOf<HTMLElement> | string;
-
-export function AddClass(elements: Elements[], classNames: string[]) {
-    elements.forEach((element) => {
-        if (typeof element === "string") {
-            const elements = document.querySelectorAll(element);
-            elements.forEach((element) => {
-                //console.log("adding classes to", element);
-                element.classList.add(...classNames);
-            });
-        } else {
-            let list: HTMLElement[];
-            if (element instanceof HTMLElement) list = [element];
-            else list = Array.from(element);
-
-            list.forEach((element) => {
-                //console.log("adding classes to", element);
-                element.classList.add(...classNames);
-            });
-        }
-    });
-}
-
-export function RemoveClass(elements: Elements[], classNames: string[]) {
-    elements.forEach((element) => {
-        if (typeof element === "string") {
-            const elements = document.querySelectorAll(element);
-            elements.forEach((element) => {
-                element.classList.remove(...classNames);
-            });
-        } else {
-            let list: HTMLElement[];
-            if (element instanceof HTMLElement) list = [element];
-            else list = Array.from(element);
-
-            list.forEach((element) => {
-                element.classList.remove(...classNames);
-            });
-        }
-    });
-}
-
-/*
-export function AddRainbowBg(...queries: string[]) {
-    AddClass(queries, ["rainbow-bg"]);
-}
-
-export function AddRainbowBgWithShadow(...queries: string[]) {
-    AddClass(queries, ["rainbow-bg", "rainbow-bg-shadow"]);
-}
-
-export function AddRainbowText(...queries: string[]) {
-    AddClass(queries, ["rainbow-text"]);
-}
-
-export function AddRainbowTextWithShadow(...queries: string[]) {
-    AddClass(queries, ["rainbow-text", "rainbow-text-shadow"]);
-}
-
-export function RemoveRainbowBg(...queries: string[]) {
-    RemoveClass(queries, ["rainbow-bg"]);
-}
-
-export function RemoveRainbowBgWithShadow(...queries: string[]) {
-    RemoveClass(queries, ["rainbow-bg", "rainbow-bg-shadow"]);
-}
-
-export function RemoveRainbowText(...queries: string[]) {
-    RemoveClass(queries, ["rainbow-text", "rainbow-text-shadow"]);
-}
-*/
diff --git a/src/utils/ChangeQueryInnerHTML.ts b/src/utils/ChangeQueryInnerHTML.ts
deleted file mode 100644
index 43ab1db..0000000
--- a/src/utils/ChangeQueryInnerHTML.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export default function ChangeQueryInnerHTML(query: string, innerHTML: string) {
-    const elements = document.querySelectorAll(query);
-    elements.forEach((element) => {
-        element.innerHTML = innerHTML;
-    });
-}
diff --git a/src/utils/IsTrue.ts b/src/utils/IsTrue.ts
deleted file mode 100644
index 9176fb4..0000000
--- a/src/utils/IsTrue.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-export default function IsTrue(value: any) {
-    return value === true || value === "true" || value === undefined;
-}
diff --git a/src/utils/LoadGamingWebsite.ts b/src/utils/LoadGamingWebsite.ts
deleted file mode 100644
index 99d13b0..0000000
--- a/src/utils/LoadGamingWebsite.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import { UnivWebsite } from "../class/UnivWebsite";
-import IsTrue from "./IsTrue";
-//import RunFuncIfEnabled from "./RunFuncIfEnabled";
-
-// ウィンドウが読み込まれたらGundaiWebsiteのEnableRainbowを実行する
-export default function LoadGamingWebsite(website: UnivWebsite<unknown>) {
-    window.addEventListener("load", async () => {
-        const isEnabled = await website.storage.get("enabled");
-        if (IsTrue(isEnabled)) {
-            website.enable();
-        } else {
-            website.disable();
-        }
-    });
-}
diff --git a/src/utils/OpenOptions.ts b/src/utils/OpenOptions.ts
deleted file mode 100644
index ee289b6..0000000
--- a/src/utils/OpenOptions.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-type OpenOptionsArgs = "home" | "about" | "thanks" | undefined;
-
-function Open(route?: string) {
-    //return () => {
-    if (!route) return chrome.tabs.create({ url: "options.html" });
-
-    return chrome.tabs.create({ url: `options.html#${route}` });
-    //};
-}
-
-export default function OpenOptions(args: OpenOptionsArgs) {
-    if (!args) return Open();
-    switch (args) {
-        case "home":
-            return Open();
-
-        case "about":
-            return Open("/about");
-
-        case "thanks":
-            return Open("/thanks");
-    }
-}