move hint component

src/content/hint.js

@@ -1,36 +0,0 @@
-import './hint.css';
-
-export default class Hint {
-  constructor(target, tag) {
-    if (!(document.body instanceof HTMLElement)) {
-      throw new TypeError('target is not an HTMLElement');
-    }
-
-    this.target = target;
-
-    let doc = target.ownerDocument;
-    let { top, left } = target.getBoundingClientRect();
-    let { scrollX, scrollY } = window;
-
-    this.element = doc.createElement('span');
-    this.element.className = 'vimvixen-hint';
-    this.element.textContent = tag;
-    this.element.style.left = left + scrollX + 'px';
-    this.element.style.top = top + scrollY + 'px';
-
-    this.show();
-    doc.body.append(this.element);
-  }
-
-  show() {
-    this.element.style.display = 'inline';
-  }
-
-  hide() {
-    this.element.style.display = 'none';
-  }
-
-  remove() {
-    this.element.remove();
-  }
-}