chore: code tidy

source/components/content/copy.mjs

@@ -21,14 +21,12 @@ import {
     ATTRIBUTE_ERRORMESSAGE,
     ATTRIBUTE_ROLE,
 } from "../../dom/constants.mjs";
-import {CustomElement, getSlottedElements} from "../../dom/customelement.mjs";
+import {CustomElement} from "../../dom/customelement.mjs";
 import {
     assembleMethodSymbol,
     registerCustomElement,
 } from "../../dom/customelement.mjs";
 import {getDocument} from "../../dom/util.mjs";
-import {isString} from "../../types/is.mjs";
-import {validateString} from "../../types/validate.mjs";
 import {STYLE_DISPLAY_MODE_BLOCK} from "../form/constants.mjs";
 import {CopyStyleSheet} from "./stylesheet/copy.mjs";
 import {fireCustomEvent} from "../../dom/events.mjs";